@misc{indiciaed8b78f95e2f6,
  title = {Sample location and analytical data for samples collected and analyzed as of June 1, 1982, in the eight 30-minute divisions of the Butte 1 degree x 2 degrees CUSMAP Quadrangle, Montana},
  author = {W. L. Campbell and S.K. McDanal and R. T. Hopkins},
  year = {1982},
  doi = {10.3133/ofr82617a},
  url = {https://pubs.usgs.gov/publication/ofr82617A},
  note = {Source identifier: ofr82617A}
}