1.
|
[Reston, VA : U.S. Geological Survey], 1995.
I 19.76: 94-589 |
|
2.
|
Menlo Park, Calif. : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1992.
I 19.76: 92-715 |
|
3.
|
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
I 19.76: 99-311 |
|
4.
|
[Menlo Park, CA] : U.S. Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-347 |
|