@misc{indiciae6322ab5ab95c,
  title = {Geologic map of the Ennis Lake quadrangle, Madison County, Montana},
  author = {Karl S. Kellogg},
  year = {1993},
  doi = {10.3133/gq1729},
  url = {https://pubs.usgs.gov/publication/gq1729},
  note = {Source identifier: gq1729}
}