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Lexicon of geologic names of the United States
(including Alaska)
Compiled by M. Grace Wilmarth, secretary of the Committee on geologic names of the United States Geological survey. April 1, 1905 to April 30, 1937.

APA Citation

Wilmarth, M. Grace. (1938). Lexicon of geologic names of the United States: (including Alaska). Washington: U.S. Govt. print. off..

Wilmarth, Mary Grace, 1866-. Lexicon of Geologic Names of the United States: (including Alaska). Washington: U.S. Govt. print. off., 1938.

Warning: These citations may not always be complete (especially for serials).