1.
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Denver : Colorado Geological Survey, 1972.
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2.
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[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2001.
I 19.76: 94-0260 A |
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3.
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[Denver, Colo.] : The Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-700 |
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4.
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[Reston, Va.?] : The Survey, 1996.
I 19.76: 96-717 |
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5.
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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, 1989.
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6.
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Washington : U.S. Govt. Print. Off., 1977.
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7.
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[Reston, Va.?] : The Survey, 1995.
I 19.76: 95-52 |
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8.
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[Reston, Va.?] : The Survey, 1994.
I 19.76: 94-696 |
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9.
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[Reston, Va.?] : The Survey, 1996.
I 19.76: 96-275 |
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10.
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[Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 92-194 |
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