1.
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Denver, CO : U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 91-617 |
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2.
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[Denver, Colo.?] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1994.
I 19.76: 94-439 |
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3.
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[Reston, Va.?] : The Survey, 1994.
I 19.76: 94-632 |
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4.
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[Reston, Va.?] : The Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1995.
I 19.76: 95-263 |
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5.
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Denver, CO : U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 91-632 |
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6.
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Washington : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1995 [i.e. 1996]
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7.
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Washington : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1996.
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