Author
United States. National Park Service
Geological Survey (U.S.)
3
Geological Survey (U.S.),
2
United States. Forest Service
2
BNSF Railway
1
Little Bighorn Battlefield National Monument (Agency : U.S.)
1
Mills, Taylor J.,
1
Montana
1
Montana. Department of Fish, Wildlife, and Parks
1
Montana. Department of Transportation
1
National Park Foundation
1
National Trust for Historic Preservation in the United States
1
Scott, Douglas D.
1
Steen, Kathryn
1
U.S. Coast and Geodetic Survey
1
United States. Animal and Plant Health Inspection Service
1
United States. Bureau of Land Management
1
Waterton Glacier International Peace Park (Agency: U.S.)
1
Whipple, James W.
1