4. Tajikistan Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
5. Tajikistan Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
7. Tampa St. Petersburg area Publication/Creation: [S.l.] : Maps.com, c2001 Format: Map Access & Availability: Loading
8. Tangier Island quadrangle, Virginia : 7.5-minute series Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2011- Format: Map Access & Availability: Loading
9. Tanzania Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
10. Tanzania Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
11. A tapestry of time and terrain Author/Creator: Vigil, Joe F. Publication/Creation: Denver, Colo. : For sale by USGS Map Distribution Format: Map Edition: Version 1.0. Access & Availability: Loading
12. Tectonic map of the Death Valley ground-water model area, Nevada and California Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : U.S. Geological Survey, 2002 Format: Map Access & Availability: Loading
13. Tel Aviv Publication/Creation: [S.l.] : Maps.com, c2001 Format: Map Access & Availability: Loading
14. Temporal changes in the configuration of the water table in the vicinity of the management systems evaluation area site, central Nebraska Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Lincoln, Nebraska : U.S. Department of the Interior, U.S. Geological Survey, 1996 Format: Map Access & Availability: Loading
15. Tennessee Publication/Creation: [S.l.] : Maps.com, c2002 Format: Map Access & Availability: Loading
16. Tennessee Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
17. Tennessee Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
18. Terrestrial ecosystems, isobioclimates of the conterminous United States Author/Creator: Cress, Jill J. (Jill Janene) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Format: Map Edition: Version 1.0. Access & Availability: Loading
19. Terrestrial ecosystems, land surface forms of the conterminous United States Author/Creator: Cress, Jill J. (Jill Janene) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Format: Map Edition: Version 1.0. Access & Availability: Loading
20. Terrestrial ecosystems of the conterminous United States Author/Creator: Sayre, Roger Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2010 Format: Map Edition: Version 1.0. Access & Availability: Loading
21. Terrestrial ecosystems, surficial lithology of the conterminous United States Author/Creator: Cress, Jill J. (Jill Janene) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2010 Format: Map Edition: Version 1.0. Access & Availability: Loading
22. Terrestrial ecosystems, topographic moisture potential of the conterminous United States Author/Creator: Cress, Jill J. (Jill Janene) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Format: Map Edition: Version 1.0. Access & Availability: Loading
26. Texas health atlas Author/Creator: Estaville, Lawrence E. (Lawrence Ernest) Publication/Creation: College Station : Texas A&M University Press, 2012 Format: Map Edition: 1st edition. Access & Availability: Loading
27. Texas magnetic and gravity maps and data, a website for distribution of data Author/Creator: Bankey, Viki Publication/Creation: Denver, Colo. : U.S. Geological Survey, 2007 Format: Map Edition: Version 1.0, posted January 2007. Access & Availability: Loading
28. The Texas Revolution, 1835-1836 Publication/Creation: [S.l.] : Maps.com, c2000 Format: Map Access & Availability: Loading
29. Texture, carbonate content, and preliminary maps of surficial sediments of the Flower Garden Banks area, northwestern Gulf of Mexico Outer Shelf Author/Creator: Scanlon, Kathryn M. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Format: Map Access & Availability: Loading
30. Thailand Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
31. Thailand Publication/Creation: [S.l.] : Maps.com, c1999 Format: Map Access & Availability: Loading
32. Thayer's new map of the state of Colorado completed from official surveys and explorations Publication/Creation: Denver, Colorado : H. L. Thayer, 1879 Format: Map Access & Availability: Loading
33. Thematic Mapper-derived mineral distribution maps of Idaho, Nevada, and Western Montana Author/Creator: Raines, Gary L. Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, 2006 Format: Map Edition: Version 1.0. Access & Availability: Loading
34. Thermal maturity map of Devonian shale in the Illinois, Michigan, and Appalachian Basins of North America Publication/Creation: [Reston, Virginia] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, 2012 Format: Map Access & Availability: Loading
35. Thermal maturity map of Devonian shale in the Illinois, Michigan, and Appalachian Basins of North America Author/Creator: East, Joseph A. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, 2012 Format: Map Access & Availability: Loading
36. Thickness and potential well yield of the stratified deposits in the Croton River Basin, Putnam County, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Albany, New York : Department of the Interior, U.S. Geological Survey, 1988 Format: Map Access & Availability: Loading
37. Thickness of the Mississippi River alluvium and thickness of the coarse sand and gravel in the Mississippi River alluvium in northwestern Mississippi Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Pearl, Mississippi : U.S. Department of the Interior, U.S. Geological Survey, 1996 Format: Map Access & Availability: Loading
38. Thickness of the Mississippi River Valley alluvial aquifer in eastern Arkansas Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : U.S. Department of the Interior, U.S. Geological Survey, 1997 Format: Map Access & Availability: Loading
39. Thickness of the Mississippi River Valley confining unit, eastern Arkansas Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : U.S. Department of the Interior, U.S. Geological Survey, 1993, 1994 Format: Map Access & Availability: Loading
40. Thickness of the upper and lower confining units of the Mississippi River alluvial aquifer in northwestern Mississippi Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Jackson, Mississippi : U.S. Department of the Interior, U.S. Geological Survey, 1994 Format: Map Access & Availability: Loading
41. Thickness of unconsolidated deposits in southeastern Batavia, Genesee County, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Ithaca, N.Y.] : U.S. Department of the Interior, U.S. Geological Survey, 1994 Format: Map Access & Availability: Loading
42. Thickness of unconsolidated deposits in the Puget Sound lowland, Washington and British Columbia Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Tacoma, Washington : U.S. Department of the Interior, U.S. Geological Survey, 1996 Format: Map Access & Availability: Loading
43. Thickness of unconsolidated deposits in the towns of Solon and Taylor, Cortland County, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1996 Format: Map Access & Availability: Loading
44. Three maps from Guide to the Yukon gold fields, where they are and how to reach them. Author/Creator: Wilson, Veazie, 1865-1895, cartographer Publication/Creation: Seattle : The Calvert Company, 1895 Format: Map Access & Availability: Loading
45. Three-dimensional geologic framework modeling of faulted hydrostratigraphic units within the Edwards Aquifer, northern Bexar County, Texas Author/Creator: Pantea, Michael P. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Format: Map Edition: Version 1.0. Access & Availability: Loading
46. Three-dimensional geologic map of southern Carson Sink, Nevada, including the Fallon FORGE area Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the interior, U.S. Geological Survey, 2019 Format: Map Access & Availability: Loading
47. Three-dimensional geologic map of the Brady Geothermal Area, Nevada Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2021 Format: Map Access & Availability: Loading
48. Three-dimensional geologic map of the Hayward fault zone, San Francisco Bay region, California Publication/Creation: [Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 2008 Format: Map Edition: Version 1.0. Access & Availability: Loading
49. Three-year average unemployment rates in Appalachia, 2003-2005 : (county rates) Author/Creator: Appalachian Regional Commission Publication/Creation: [Washington, D.C.] : [Appalachian Regional Commission], [2007] Format: Map Access & Availability: Loading
51. Time of travel of solutes in Buffalo Bayou and selected tributaries, Houston, Texas, August 1999 Author/Creator: Geological Survey (U.S.) Publication/Creation: [Austin, Tex.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 2000 Format: Map Access & Availability: Loading
52. Time of travel of solutes in Buffalo Bayou and selected tributaries, Houston, Texas, August 1999 Author/Creator: Geological Survey (U.S.) Publication/Creation: [Denver, CO] : [For sale by Branch of Information Services]. Format: Map Access & Availability: Loading
53. Time of travel of solutes in the Sabine River Basin, Texas, August-November 1996 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Austin, Texas : U.S. Department of the Interior, U.S. Geological Survey, 1997 Format: Map Access & Availability: Loading
59. Topobathymetric data for Tampa Bay, Florida Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, 2007 Format: Map Edition: Version 1.0., revised. Access & Availability: Loading
60. Topographic and color-coded contour maps of Mars Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey, Information Services Format: Map Access & Availability: Loading
61. Topographic and hydrographic GIS dataset for the Afghanistan Geological Survey and U.S. Geological Survey 2010 minerals project Author/Creator: Chirico, Pete Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2011 Format: Map Access & Availability: Loading
62. Topographic map of part of the Kasei Valles and Sacra Fossae regions of Mars, MTM 500k 20/287E OMKT Author/Creator: Rosiek, Mark R. 1957- (Mark Robert) Publication/Creation: [Reston, Va.] : U.S. Geological Survey, 2005 Format: Map Edition: Version 1.0, April 1, 2005. Access & Availability: Loading
63. Topographic map of quadrangle 3162, Chakhansur (603) and Kotalak (604) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
64. Topographic map of quadrangle 3164, Lashkargah (605) and Kandahar (606) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
65. Topographic map of quadrangle 3166, Jaldak (701) and Maruf-Nawa (702) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
66. Topographic map of quadrangle 3262, Farah (421) and Hokumat-E-Pur-Chaman (422) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
67. Topographic map of quadrangle 3264, Nawzad-Musa-Qala (423) and Dehrawat (424) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
68. Topographic map of quadrangle 3266, Ourzgan (519) and Moqur (520) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
69. Topographic map of quadrangle 3364, Pasa-Band (417) and Kejran (418) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
70. Topographic map of quadrangle 3366, Gizab (513) and Nawer (514) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
71. Topographic map of quadrangle 3368 and part of quadrangle 3370, Ghazni (515), Gardez (516), and JajiM̲aydan (517) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
72. Topographic map of quadrangle 3462, Herat (409) and Chesht-Sharif (410) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
73. Topographic map of quadrangle 3464, Shahrak (411) and Kasi (412) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
74. Topographic map of quadrangle 3466, Lal-Sarjangal (507) and Bamyan (508) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
75. Topographic map of quadrangle 3468, Chak Wardak Syahgerd (509) and Kabul (510) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
76. Topographic map of quadrangle 3470 and the northern edge of 3370, Jalal-Abad (511), Chaghasaray (512), and Northernmost Jaji-Maydan (517) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
77. Topographic map of quadrangle 3564, Chahriaq (Joand) (405) and Gurziwan (406) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
78. Topographic map of quadrangle 3566, Sang-Charak (501) and Sayghan-O-Kamard (502) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
79. Topographic map of quadrangle 3568, Polekhomri (503) and Charikar (504) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
80. Topographic map of quadrangle 3570, Tagab-E-Munjan (505) and Asmar-Kamdesh (506) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
81. Topographic map of quadrangle 3670, Jam-Kashem (223) and Zebak (224) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
82. Topographic map of quadrangle 3768 and 3668, Imam-Saheb (215), Rustaq (216), Baghlan (221), and Taloqan (222) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
83. Topographic map of quadrangles 2964, 2966, 3064, and 3066, Shah-Esmail (617), Reg-Alaqadari (618), Samandkhan-Karez (713), Laki-Bander (611), Jahangir-Naweran (612), and Sreh-Chena (707) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
84. Topographic map of quadrangles 3060 and 2960, Qala-I-Fath (608), Malek-Sayh-Koh (613), and Gozar-E-Sah (614) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
85. Topographic map of quadrangles 3062 and 2962, Charburjak (609), Khanneshin (610), Gawdezereh (615), and Galachah (616) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. ot the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
86. Topographic map of quadrangles 3168 and 3268, Yahya-Wona (703), Wersek (704), Khayr-Kot (521), and Urgon (522) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
87. Topographic map of quadrangles 3260 and 3160, Dasht-E-Chahe-Mazar (419), Anardara (420), Asparan (601), and Kang (602) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
88. Topographic map of quadrangles 3460 and 3360, Kol-I-Namaksar (407), Ghuryan (408), Kawir-I-Naizar (413), and Kohe-Mahmudo-Esmailjan (414) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
89. Topographic map of quadrangles 3560 and 3562, Sir-Band (402), Khawja-Jir (403), and Bala-Murghab (404) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
90. Topographic map of quadrangles 3666 and 3766, Balkh (219), Mazar-I-Sharif (220), Qarqin (213), and Hazara (214) quadrangles, Afghanistan Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Kabul, Afghanistan] : Afghan Geological Survey, 2005 Format: Map Access & Availability: Loading
91. Topographic map of quadrangles 3764 and 3664, Jalajin (117), Kham-Ab (118), Char Shangho (123), and Sheberghan (124) quadrangles, Afghanistan Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Kabul, Afghanistan] : Afghan Geological Survey, 2005 Format: Map Access & Availability: Loading
92. Topographic map of quadrangles 3770 and 3870, Maymayk (211), Jamarj-I-Bala (212), Faydz-Abad (217), and Parkhaw (218) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
93. Topographic map of quadrangles 3772, 3774, 3672, and 3674, Gaz-Khan (313), Sarhad (314), Kol-I-Chaqmaqtin (315), Khandud (319), Deh-Ghulaman (320), and Erftah (321) quadrangles, Afghanistan Author/Creator: Bohannon, Robert G. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Format: Map Access & Availability: Loading
94. Topographic map of the Arimanes Rupes region of Mars, MTM 500k -10/212E OMKT Author/Creator: Rosiek, Mark R. 1957- (Mark Robert) Publication/Creation: [Reston, Va.] : U.S. Geological Survey, 2005 Format: Map Edition: Version 1.0, April 1, 2005. Access & Availability: Loading
95. Topographic map of the Coronae Montes region of Mars, MTM 500k - 35/087E OMKTT Author/Creator: Rosiek, Mark R. 1957- (Mark Robert) Publication/Creation: [Reston, Va.] : U.S. Geological Survey, 2005 Format: Map Edition: Version 1.0, April 1, 2005. Access & Availability: Loading
96. Topographic map of the western region of Dao Vallis in Hellas Planitia, Mars, MTM 500k -40/082E OMKT Author/Creator: Rosiek, Mark R. 1957- (Mark Robert) Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, 2006 Format: Map Edition: Version 1.0. Access & Availability: Loading
97. Topographical map of the Reese River mines located in the vicinity of the town of Austin, Lander County, N.T. Author/Creator: Allardt, G. F., cartographer Publication/Creation: San Francisco : Lith. Britton & Co., 1863 Format: Map Access & Availability: Loading
98. Topographical map of the road from Missouri to Oregon, commencing at the mouth of the Kansas in the Missouri River and ending at the mouth of the Wallah Wallah in the Columbia : in VII sections Author/Creator: Preuss, Charles, 1803-1854, cartographer Publication/Creation: Baltimore : E. Webber & Co., [approximately 1846] Format: Map Access & Availability: Loading
99. Topography and landforms of Ecuador Author/Creator: Chirico, Pete Publication/Creation: Denver, CO : Information Services [distributor]. Format: Map Edition: Version 1.0. Access & Availability: Loading
100. Topography of the southern Hawaiian Islands Author/Creator: Chase, Thomas E. Publication/Creation: [Menlo Park, Calif.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1980 Format: Map Access & Availability: Loading