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1.
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New York : Harper & Row, ©1988.
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2.
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Washington : U.S. G.P.O. ; Denver, CO : For sale bo Book and Open-File Reports Sales, U.S. Geological Survey, 1992.
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3.
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[Denver, CO?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
I 19.76: 99-501 |
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4.
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[Denver, CO?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1998.
I 19.76: 98-514 |
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5.
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[Menlo Park, CA] : U.S. Geological Survey, 1998.
I 19.76: 98-512 |
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6.
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[Reston, Va.] : U.S. Geological Survey, 1991.
I 19.76: 91-384 |
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