Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming - Coban, William Aubrey, 1916- (Washington, D.C. : United States Geological Survey, 1990)
Keywords: Ammonoidea -- Wyoming -- Natrona County; Bivalves, Fossil -- Wyoming -- Natrona County; Paleontology -- Cretaceous; Paleontology -- Wyoming -- Natrona County; Frontier Formation