71. Hydrogeology of the Olean area, Cattaraugus County, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Denver, Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey Resource Type: Map Access & Availability: Loading
72. Water-level maps of the alluvial aquifer in eastern Arkansas, 1985 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
73. Difference between the potentiometric surface of the Aquia aquifer in Spring of 1979 and Fall of 1986 in southern Maryland Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
74. Geology and hydrology of the deep bedrock aquifers in eastern Colorado Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
75. Geologic structure and altitude of the top of the Minnelusa Formation, northern Black Hills, South Dakota and Wyoming, and Bear Lodge Mountains, Wyoming Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Denver, Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey Resource Type: Map Access & Availability: Loading
76. Ground-water levels in the lower Paleozoic and Precambrian crystalline rocks, southeastern Chester County, Pennsylvania, July and August 1986 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : United States Department of the Interior, Geological Survey, 1987 Resource Type: Map Access & Availability: Loading