Geology of the Otter Creek Quadrangle Montana
by Arthur James Boucot, J. R. Williams, James Morton Schopf, Roger Burnham Colton, Troy Lewis Péwé, Willis Howard Nelson, Robert A. Gulbrandsen, Joseph P. Dobell, Russell A. Paige, William Albert Oliver · 1962
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Page count: 46
Information required in describing coal beds, with a discussion of sampling methods and applications for coal geology.