1.
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Washington : Dept. of the Interior, Geological Survey : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
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2.
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Washington : U.S. G.P.O., 1981.
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3.
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Washington : U.S. G.P.O., 1991.
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4.
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Washington, D.C. : U.S. G.P.O. ; Alexandria, VA : For sale by the Distribution Branch, U.S. Geological Survey, 1986.
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5.
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Washington, D.C. : For sale by the Supt. of Docs., U.S. G.P.O., 1981.
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6.
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Washington, U.S. Govt. Print. Off., 1970.
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