1.
|
[Denver, CO] : U.S. Geological Survey, 1990.
I 19.76: 90-683 |
|
2.
|
Menlo Park, CA : U.S. Dept. of the Interior,Geological Survey ; 1990.
I 19.76: 90-454-A |
|
3.
|
Menlo Park, CA : U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor, 1992]
I 19.76: 92-287 |
|
4.
|
Menlo Park, Calif. : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-376 |
|
5.
|
[Menlo Park, Calif.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Open-File Reports Section, distributor], 1994.
I 19.76: 94-222 |
|
6.
|
[Menlo Park, Calif.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Open-File Reports Section, distributor, 1994?]
I 19.76: 94-552 |
|