1.
|
Washington : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1988.
|
2.
|
Washington, D.C. : U.S. Dept. of the Interior, Geological Survey, 1985.
|
3.
|
Reston, Va. : The Survey ; Denver, CO : Information Services [distributor], 2000.
|
4.
|
Reston, Va. : The Survey ; Denver, CO : Information Services [distributor], 2000.
|
5.
|
Reston, Va. : The Survey ; Denver, CO : Information Services [distributor], 2000.
|
6.
|
Reston, Va. : The Survey ; Denver, CO : Information Services [distributor], 1999.
|