1.
|
Denver, CO : U.S. Geological Survey : [Books and Open File Reports Section, distributor], 1990.
I 19.76: 90-227-A |
|
2.
|
Denver, Colo. : U.S. Geological Survey ; Books and Open-File Reports Section [distributor], 1992.
I 19.76: 92-283-A |
|
3.
|
Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1992.
I 19.76: 92-591-A |
|
4.
|
Denver, CO : U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
I 19.76: 91-617 |
|
5.
|
[Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Services Section, distributor], 1992.
I 19.76: 92-509-A |
|
6.
|
[Denver, Colo.?] : U.S. Dept. of the Interior, U.S. Geological Survey : [Open-File Reports Section, distributor], 1994.
I 19.76: 93-619 |
|