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I 19.76: 94-575 |
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I 19.76: 95-622 |
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[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Open-File Reports Section, distributor, 1994?]
I 19.76: 94-223 |
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[Reston, VA] : U.S. Geological Survey, [1994]
I 19.76: 94-688 |
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[Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Open-File Reports Section, distributor, 1995]
I 19.76: 95-255 |
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I 19.76: 96-508 |
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[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
I 19.76: 99-324 |
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I 19.76: 94-671 |
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I 19.76: 92-298 |
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I 19.75: 92-267 |
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