Wilmarth, M. G. (1931). Names and definitions of the geologic units of California. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationWilmarth, M. Grace. Names and Definitions of the Geologic Units of California. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1931.
MLA (9th ed.) CitationWilmarth, M. Grace. Names and Definitions of the Geologic Units of California. United States Department of the Interior, Geological Survey, 1931.
Warning: These citations may not always be 100% accurate.