The Prichard Formation of the lower part of the Belt Supergroup (middle Proterozoic), near Plains, Sanders County, Montana /
Cressman, Earle Rupert,1923-
Geological Survey (U.S.)
Washington : U.S. G.P.O.,
1985.
Includes bibliographical references (p. 60-64).
Geology, Stratigraphic
Geology