Geologic map of the Hansen Ranch quadrangle, Beaverhead County, southwest Montana

@inproceedings{Mgonigle1991GeologicMO,
  title={Geologic map of the Hansen Ranch quadrangle, Beaverhead County, southwest Montana},
  author={John W. M'gonigle and Mark A. Kirschbaum and Jean N. Weaver},
  year={1991}
}