N. H. Et Al. Darton books & textbook
Geologic Atlas of the United States : Laramie-Sherman Folio, Wyoming, 1910, Folios of the Geologic Atlas of the United States, Number 173 : 128 pages and 7 maps.
United States Geological Survey /1910-01-01 Paperback
Trenton folio, New Jersey-Pennsylvania, (United States Geological Survey. Geologic atlas of the United States. [Library ed.])
BASCOM, F., N.H. Darton, H.B. Kummel, et al.
U.S. Geological Survey /1909T Paperback
