1.
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Washington : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1988.
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2.
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Washington : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1987.
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3.
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[Washington] : U.S. G.P.O. ; Denver, CO : For sale by Book and Open-File Report Sales, U.S. Geological Survey, 1992.
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4.
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[Washington] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1991.
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5.
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Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : For sale by U.S. Geological Survey Information Serivces, 1995.
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