@misc{indiciae05826e239139,
  title = {Geologic map of the Ringling quadrangle, Meagher County, Montana},
  author = {Laura W. McGrew},
  year = {1977},
  doi = {10.3133/gq1382},
  url = {https://pubs.usgs.gov/publication/gq1382},
  note = {Source identifier: gq1382}
}