Stratigraphy and geological history of the amsden formation (Mississippian and Pennsylvanian) of Wyoming - Scando, William J.; Gordan, Mackenzie; Dutro, J. Thomas; United States. Department of the Interior (Washington, D.C. : U.S. Government Printing Office, 1975)
Keywords: Geology, Stratigraphic -- Mississippian -- United States; Geology -- Mississippian -- United States