Paleozoic and Mesozoic Stratigraphy of the Northern Part of the Ruby Range, Southwestern Montana Russell G. Tysdal Published: 1976 Total Pages: 44 Get eBook
Stratigraphic Cross Section of Paleozoic Rocks, Oklahoma to Saskatchewan Russell Smith Published: 1967 Total Pages: 23 Get eBook
Geological Survey Professional Paper Geological Survey (U.S.) Published: 1975 Total Pages: 604 Get eBook
New Publications of the Geological Survey Geological Survey (U.S.) Published: 1991 Total Pages: 746 Get eBook
