Wilmarth, M. G. (1957). Lexicon of geologic names of the United States: Including Alaska ; also includes the names and ages, but not the definitions, of the named geologic units of Canada, Mexico, the West Indies, Central America, and Hawaii. US Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Wilmarth, Mary Grace. Lexicon of Geologic Names of the United States: Including Alaska ; Also Includes the Names and Ages, but Not the Definitions, of the Named Geologic Units of Canada, Mexico, the West Indies, Central America, and Hawaii. Washington: US Gov. Print. Off, 1957.
MLA-Zitierstil (9. Ausg.)Wilmarth, Mary Grace. Lexicon of Geologic Names of the United States: Including Alaska ; Also Includes the Names and Ages, but Not the Definitions, of the Named Geologic Units of Canada, Mexico, the West Indies, Central America, and Hawaii. US Gov. Print. Off, 1957.