1.
|
[Reston, Va.] : The Survey, 1995.
I 19.76: 95-481 |
|
2.
|
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by Book and Open-File Report Sales, 1992.
|
3.
|
[Reston, Va.?] : The Survey, 1996.
I 19.76: 96-32 |
|
4.
|
Washington : U.S. Govt. Print. Off., 1975.
|
5.
|
[Reston, Va.?] : The Survey, 1997.
I 19.76: 97-703 |
|
6.
|
[Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey, [1992]
I 19.76: 92-282-A |
|
7.
|
[Reston, Va.] : The Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1994.
I 19.76: 94-225 A |
|
8.
|
[Reston, Va.?] : The Survey, 1995.
I 19.76: 95-482 |
|
9.
|
[Reston, Va.?] : The Survey, 1997.
I 19.76: 97-722 |
|