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A. Redefinition of Frontier Formation-Beaverhead Group contact, Lima Peaks area, southwestern Montana and southeastern Idaho / by T.S. Dyman, J.C. Haley, and W.J. Perry, Jr.
Biostratigraphic correlation of Santonian and Campanian formations in the northwestern part of Yellowstone National Park, and the Madison Range, and Livingston area of southwestern Montana / by R.G. Tysdal and D.J. Nichols
Occurrence and significance of the middle Turonian (Upper Cretaceous) belemnite Actinocamax in central western Montana / by William A. Cobban.

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