Mineral resources of the Blacktail Mountains Wilderness Study Area, Beaverhead County, Montana / by R.G. Tysdal ... [et al.] (U.S. Geological Survey bulletin ; 1724-B) (Mineral resources wilderness study areas--southwestern, Montana ; ch. B)
Mineral resources of the Blacktail Mountains Wilderness Study Area, Beaverhead County, Montana / by R.G. Tysdal ... [et al.]
(U.S. Geological Survey bulletin ; 1724-B) (Mineral resources wilderness study areas--southwestern, Montana ; ch. B)