1.
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Washington, D.C. : U.S. Geological Survey, 1986.
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2.
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Washington : U.S. Govt. Print. Off., 1974.
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3.
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Washington, D.C. : U.S. G.P.O. ; Denver CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1991.
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4.
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New York : Geological Society of America, 1952.
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5.
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Washington : U.S. G.P.O. ; Alexandria, VA : For sale by the U.S. Geological Survey, 1985.
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6.
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[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey ; Alexandria, VA : For sale by the Branch of Distribution, USGS, 1984.
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7.
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Washington, U.S. Govt. Print. Off., 1971.
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8.
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Washington : U.S. G.P.O. : Dept. of the Interior, U.S. Geological Survey, 1987.
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9.
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Washington : U.S. G.P.O., 1988.
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10.
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Washington, U.S. Govt. Print. Off., 1973.
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