@misc{indiciae39df00d8164a,
  title = {Geologic map of the Sixteen quadrangle, Gallatin and Meagher Counties, Montana},
  author = {Laura W. McGrew},
  year = {1977},
  doi = {10.3133/gq1383},
  url = {https://pubs.usgs.gov/publication/gq1383},
  note = {Source identifier: gq1383}
}