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42. Water-level maps of the Mississippi River Valley alluvial aquifer in eastern Arkansas, 1986
43. Altitude and configuration of the potentiometric surface in the Triassic sandstones and shales, northeastern Chester County, Pennsylvania, September 1987 through January 1988
44. Hydrologic maps of the High Plains Aquifer, southwestern Kansas, January 1986
45. Ground-water levels in the lower Paleozoic and Precambrian crystalline rocks, of East Bradford and West Bradford townships, Chester County, Pennsylvania, July and August 1987
46. Elevation of the water-table surface for the alluvial aquifer and hydrologic conditions in the Santa Isabel-Juana Diaz area, Puerto Rico, March 1986
47. Ground-water levels in the lower Paleozoic and Precambrian crystalline rocks, southeastern Chester County, Pennsylvania, July and August 1986
48. Percentage change in saturated thickness of the High Plains aquifer, west-central Kansas, 1950 to average 1985-87
49. Ground-water levels in the Lower Paleozoic carbonate rocks of western Chester Valley, Chester County, Pennsylvania, November 1984
50. Altitude and configuration of the water table, and depth to water near Cheyenne, Wyoming, May 1984
51. Potentiometric map of the Gordo Aquifer in northeastern Mississippi, November and December, 1982
52. Water table in rocks of Cenozoic and Paleozoic age, 1980, Yucca Flat, Nevada Test Site, Nevada
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