TY - RPRT TI - Resource potential of the Bear Trap Canyon Instant Study Area, Madison County, Montana AU - Darrell M. Pinckney AU - William F. Hanna AU - Harald E. Kaufman AU - Charles E. Larson PY - 1980 DO - 10.3133/ofr80835 UR - https://pubs.usgs.gov/publication/ofr80835 ID - ofr80835 ER -