National Geologic Mapping Program (U.S.) & Bernknopf, R. L. (1993). Societal value of geologic maps. U.S. G.P.O..
Chicago Style (17th ed.) CitationNational Geologic Mapping Program (U.S.) and Richard L. Bernknopf. Societal Value of Geologic Maps. [Washington, D.C.?]: U.S. G.P.O., 1993.
MLA (9th ed.) CitationNational Geologic Mapping Program (U.S.) and Richard L. Bernknopf. Societal Value of Geologic Maps. U.S. G.P.O., 1993.
Warning: These citations may not always be 100% accurate.