1.
|
[Reston, Va.] : U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1992.
I 19.76: 92-180 |
|
2.
|
[Reston, Va.] : United States Department of the Interior, Geological Survey, 1990.
I 19.76: 90-669 |
|
3.
|
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
I 19.76: 99-9 |
|
4.
|
[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey, 1990.
I 19.76: 90-549 |
|
5.
|
[Reston, VA] : U.S. Geological Survey, 1999.
I 19.76: 99-521 |
|
6.
|
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [1998]
I 19.76: 98-342 |
|
7.
|
Reston, VA : Geological Survey, 2001.
|
8.
|
Reston, VA : U.S. Geological Survey ; [Denver, Va. : Books and Open-File Reports Section, distributor, 1991]
I 19.76: 91-616 |
|
9.
|
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, [1997]
I 19.76: 97-53 |
|
10.
|
[Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey], 1995.
I 19.76: 93-591 |
|