@misc{indiciaea73b2411c2e8,
  title = {Photogeologic and reconnaissance geologic map of the Horse Creek Quadrangle, Custer County, Montana},
  author = {S. J. Luft},
  year = {1986},
  doi = {10.3133/mf1871},
  url = {https://pubs.usgs.gov/publication/mf1871},
  note = {Source identifier: mf1871}
}