Wilmarth, M. G. (1938). Lexicon of geological name of the United States. Government Printing Offices.
Chicago Style (17th ed.) CitationWilmarth, Mary Grace. Lexicon of Geological Name of the United States. Washington: Government Printing Offices, 1938.
MLA (9th ed.) CitationWilmarth, Mary Grace. Lexicon of Geological Name of the United States. Government Printing Offices, 1938.