1.
|
[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-285-A |
|
2.
|
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1996.
I 19.76: 96-45 |
|
3.
|
[Denver, CO] : U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 91-594-A |
|
4.
|
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1996.
I 19.76: 96-256 |
|
5.
|
[Denver, CO] : U.S. Geological Survey, 1998.
I 19.76: 98-224-C |
|
6.
|
[Washington] : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1992.
|