@misc{indiciae02eefae1630d,
  title = {Geologic map of the Sixteen NE Quadrangle, Gallatin, Meagher, and Park counties, Montana},
  author = {Laura W. McGrew},
  year = {1974},
  doi = {10.3133/ofr74109},
  url = {https://pubs.usgs.gov/publication/ofr74109},
  note = {Source identifier: ofr74109}
}