Stratigraphy of Mid-Cretaceous Blackleaf and lower part of the frontier formations in parts of Beaverhead and Madison counties, Montana
- by Thaddeus S. Dyman and Douglas J. Nichols.
- [Washington, D.C.] : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1988.
- Physical description
- iv, 31 pages : illustrations ; 28 cm.
- U.S. Geological Survey bulletin ; 1773.
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