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1Published 1979Table of Contents: “... (Permian) in Idaho, Montana, Utah, and Wyoming.--Wardlaw, B. R., Collinson, J. W., Maughan, E. K...”
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2Published 1979Table of Contents: “...) in Idaho, Montana, Utah, and Wyoming / by B.R. Wardlaw -- (B.) The Murdock Mountain formation / by B.R...”
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