APA Citation

Paulachok, G. N., Philadelphia (Pa.). Water Department., & Geological Survey (U.S.). (1991). Geohydrology and ground-water resources of Philadelphia, Pennsylvania. [Reston, Va.?] : Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Books and Open-File Reports Section.

Chicago Style Citation

Paulachok, Gary N., Philadelphia (Pa.). Water Department, and Geological Survey (U.S.). Geohydrology and Ground-water Resources of Philadelphia, Pennsylvania. [Reston, Va.?] : Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Books and Open-File Reports Section, 1991.

MLA Citation

Paulachok, Gary N., Philadelphia (Pa.). Water Department, and Geological Survey (U.S.). Geohydrology and Ground-water Resources of Philadelphia, Pennsylvania. [Reston, Va.?] : Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Books and Open-File Reports Section, 1991.

Warning: These citations may not always be 100% accurate.