Author
National Operations Center (U.S.)
United States. Bureau of Land Management
465
Geological Survey (U.S.)
453
United States. Bureau of Land Management. Montana State Office
102
United States. Bureau of Land Management. New Mexico State Office
89
United States. Bureau of Land Management. Wyoming State Office
76
United States. Bureau of Land Management. Colorado State Office
55
United States. Bureau of Land Management. Oregon State Office
51
United States. Bureau of Land Management. Nevada State Office
24
United States. Bureau of Land Management. Idaho State Office
23
United States. Bureau of Land Management. Utah State Office
21
United States. Bureau of Land Management. Arizona State Office
19
United States. Bureau of Land Management. California State Office
9
United States. Bureau of Land Management,
3