@misc{indiciae097f27f2b4fa,
  title = {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},
  author = {James E. Elliott and C. M. Trautwein and C. A. Wallace and G. K. Lee and L. C. Rowan and W. F. Hanna},
  year = {1993},
  doi = {10.3133/cir1088},
  url = {https://pubs.usgs.gov/publication/cir1088},
  note = {Source identifier: cir1088}
}