@book{ 0-1142168689, title = {The Permian and Triassic seven devils group, western Idaho and northeastern Oregon}, series = {Geological Survey bulletin}, author = {Vallier, Tracy L.}, address = {Washington}, publisher = {United States Government Printing Office}, year = {1977}, language = {English}, url = {https://katalog.ub.tu-freiberg.de/Record/0-1142168689} }