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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : Books and Open-File Reports Section, distributor], 1993.
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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
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Denver, Colo : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey ; [Books and Open-File Reports Section, distributor], 1993.
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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
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