1.
|
[Menlo Park, Calif.] : U.S. Geological Survey, 1990.
I 19.76: 90-413 |
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2.
|
[Reston, Va.] : The Survey, 1999.
I 19.76: 99-331 |
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3.
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[Reston, Va.] : The Survey, 1999.
I 19.76: 98-494 |
|
4.
|
Washington, U.S. Govt. Print. Off., 1972.
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5.
|
[Reston, Va.] : The Survey, 1996.
I 19.76: 97-481 |
|
6.
|
Denver, CO : U.S. Dept. of the Interior, Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 91-441-P |
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7.
|
[Reston, Va.] : The Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-302 |
|
8.
|
Menlo Park, Calif. : The Survey ; [Denver, CO : For sale by Information Services], 1996.
I 19.76: 95-18 |
|
9.
|
Menlo Park, Calif. : The Survey ; [Denver, CO : For sale by Information Services], 1996.
I 19.76: 95-20 |
|
10.
|
[Reston, Va.?] : The Survey, 1995.
I 19.76: 95-641 |
|