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Author/Creator
- Geological Survey (U.S.)9
- Omang, R. J.9
- Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation, Montana4
- Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana3
- Parrett, Charles3
- Hull, J. A.2
- United States. Bureau of Land Management2
- Montana. Department of Highways1
- Montana. Department of Natural Resources and Conservation1
- United States. Forest Service1