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by Flugrath, Marvin W.
Austin, Tex. : Denver, Colo. : U.S. Dept. of the Interior, Geological Survey ; Open-File Services Section, Western Distribution Branch [distributor], 1986
Austin, Tex. : Denver, Colo. : U.S. Dept. of the Interior, Geological Survey ; Open-File Services Section, Western Distribution Branch [distributor], 1986
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