41. Percent change in the value of farm products sold per acre of land in farms : by counties of the United States, 1939-1964 Author/Creator: United States. Bureau of the Census. Geography Division, cartographer Publication/Creation: Washington, D.C. : For sale by the Superintendent of Documents, U.S. Government Printing Office, 1970 Resource Type: Map Access & Availability: Loading
42. Percentage change in saturated thickness of High Plains aquifer, west-central Kansas, 1950 to average ... Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, United States Geological Survey, 1982-1991 Resource Type: Map Access & Availability: Loading
43. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1983-85 Author/Creator: Dague, Barbara J., author Publication/Creation: Denver Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey Resource Type: Map Access & Availability: Loading
44. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1985-87 Author/Creator: Dague, Barbara J., author Publication/Creation: Lawrence, Kansas : U.S. Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
45. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1988-90 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Lawrence, Kansas : U.S. Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Map Access & Availability: Loading
46. Permeability of soils in Mississippi Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Jackson, Mississippi : U.S. Department of the Interior, U.S. Geological Survey, 1994 Resource Type: Map Access & Availability: Loading
47. Perry West quadrangle, Georgia, 1972, photorevised 1984 : 7.5 minute series (topographic) Author/Creator: Geological Survey (U.S.) Publication/Creation: Reston, Va. : The Survey : For sale by the USGS, 1984 Resource Type: Map Edition: Photorevised 1984. Access & Availability: Loading
48. The Persian Gulf War Publication/Creation: [S.l.] : Magellan Geographix, c1997 Resource Type: Map Access & Availability: Loading
49. Perth Publication/Creation: [S.l.] : Maps.com, c1997 Resource Type: Map Access & Availability: Loading
50. Peru Publication/Creation: [S.l.] : Maps.com, c1999 Resource Type: Map Access & Availability: Loading