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Subject: "Petroleum Geology."
Subject (Era): Is
Is Is Not
Mississippian
Subject (Region): Is
Is Is Not
Montana

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1.
Mississippian and Devonian stratigraphy of northwestern Montana
Author
Sloss, L. L. (Laurence Louis), 1913-1996
Published
[Washington, D.C.] : U.S. Geological Survey, 1945.
Online
View online version
Location
Library Shelving Facility (LSF) >> Case 6 Drawer 1:1
Format
Maps & GIS
2.
Subsurface stratigraphy of the Heath shale and Amsden formation in central Montana
Author
Nieschmidt, Constance L. (Constance Leatherock), 1898-1965
Published
Washington, D.C. : U.S. Geological Survey, 1953.
Online
View online version
Location
Library Shelving Facility (LSF) >> Case 6 Drawer 1:3
Format
Maps & GIS