1.
|
[Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey], 1996.
I 19.76: 96-66 |
|
2.
|
Salt Lake City, Utah Geological and Mineralogical Survey, 1972.
|
3.
|
Reston, VA : U.S. Dept. of the Interior, U.S. Geological Survey, [1996]
I 19.76: 96-529 |
|
4.
|
[Denver, CO] : U.S. Geological Survey, [1997]
I 19.76: 97-445 |
|
5.
|
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1995.
I 19.76: 95-75-B |
|
6.
|
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, [1995]
I 19.76: 95-75-F |
|
7.
|
[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1997.
I 19.76: 97-490 |
|
8.
|
Denver, Colo. : U.S. Geological Survey, 1995.
I 19.76: 95-647 |
|
9.
|
Denver, CO : U.S. Geological Survey, [1990]
|
10.
|
[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey, 1984.
|