Guthrie, Gary Eich2015-05-122015-05-121984https://scholarworks.montana.edu/handle/1/5278enGeology, StratigraphicSedimentation and depositionStratigraphy and depositional environment of the Upper Mississippian Big Snowy Group in the Bridger Range, southwest MontanaThesisCopyright 1984 by Gary Eich Guthrie