TY - RPRT TI - The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, remote sensing, and mineral resources maps of the Butte 1 degree x 2 degrees Quadrangle, Montana AU - James E. Elliott AU - C. M. Trautwein AU - C. A. Wallace AU - G. K. Lee AU - L. C. Rowan AU - W. F. Hanna PY - 1993 DO - 10.3133/cir1088 UR - https://pubs.usgs.gov/publication/cir1088 ID - cir1088 ER -