Stratigraphic sections of upper Paleozoic and Mesozoic rocks in south-central Montana /

by Gardner, L. S. (Louis Samuel), 1904-
Published 1946

Geologic investigations in the American Republics, 1945.

by Goddard, Edwin N. (Edwin Newell), 1904-1997, Gardner, L. S. (Louis Samuel), 1904-, Burbank, W. S. (Wilbur Swett), 1898-1975
Published 1949