1.
|
[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-320 |
|
2.
|
[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-310 |
|
3.
|
[Denver, Colo.] : The Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-700 |
|
4.
|
[Reston, Va.?] : The Survey, 1995.
I 19.76: 95-52 |
|
5.
|
[Reston, Va.?] : The Survey, 1994.
I 19.76: 94-696 |
|
6.
|
[Denver, Colo.] : The Survey : [Books and Open-File Reports Section, distributor], 1993.
I 19.76: 93-699 |
|