Author
Montana Bureau of Mines and Geology
Geological Survey (U.S.)
2
Montana College of Mineral Science and Technology
2
Geological Survey (U.S.). Water Resources Division
1
Lee, Roger W.
1
Levings, Gary W.
1
Miller, W. R.
1
Tuck, L. K.
1
U.S. Fish and Wildlife Service
1
United States. Bureau of Indian Affairs
1
United States. Bureau of Land Management
1
Zimmerman, Everett A. 1927-
1