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I 19.76: 90-40 |
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I 19.76: 90-545 |
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[Menlo Park, CA] : U.S. Geological Survey ; Denver, Colo. : Books and Open-File Reports Section, distributor], 1990.
I 19.76: 90-451 |
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I 19.76: 90-469 |
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[Reston, Va.] : U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor, 1991]
I 19.76: 91-15 |
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[Denver, CO] : United States Department of the Interior, Geological Survey : Books and Open-File Reports Section [distributor], 1991.
I 19.76: 91-438-A |
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[Menlo Park, Calif.] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1993.
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