Ryan, J. D. 1., & Ryan, J. D. 1. (1964). Geology of Edgemont quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office.
Chicago Style CitationRyan, John Donald 1921-, and John Donald 1921- Ryan. Geology of Edgemont Quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office, 1964.
MLA CitationRyan, John Donald 1921-, and John Donald 1921- Ryan. Geology of Edgemont Quadrangle, Fall River Contry South Dakota. Washington: U.S. Government Printing Office, 1964.
Warning: These citations may not always be 100% accurate.