1. Pennsylvania Author/Creator: United States. Bureau of the Census. Geography Division Publication/Creation: Washington, D.C. : U.S. Dept. of Commerce, Bureau of the Census, [1983] Format: Map Access & Availability: Loading
2. Potentiometric surface of the Floridan aquifer and its use in management of water resources, St. Johns River Water Management District, Florida Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Tallahassee, Florida : U.S. Department of the Interior, U.S. Geological Survey, 1983 Format: Map Access & Availability: Loading