Coal resources and Cenozoic geology of the Girard coal field, Richland County, Montana - Prichard, George Edwards, 1916-; Landis, Edwin R. (Edwin Robert), 1926-; Geological Survey (U.S.) (Washington, D.C. : United States Government Printing Office, 1975)
"Prepared as part of the Department of the Interior program for the development of the Missouri River Basin."
Bibliography: p. 87-89
Keywords: Coal mines and mining -- Montana -- Richland Co; Geology, Stratigraphic -- Cenozoic