@misc{indiciaea17f03435374,
  title = {The Conterminous United States Mineral Appraisal Program; background information to accompany folio of geologic, geochemical, geophysical, and mineral resource maps of the Choteau 1 degree x 2 degrees Quadrangle, Montana},
  author = {Robert L. Earhart and David J. Grimes and Reinhard W. Leinz and M. Dean Kleinkopf},
  year = {1981},
  doi = {10.3133/cir849},
  url = {https://pubs.usgs.gov/publication/cir849},
  note = {Source identifier: cir849}
}