@misc{indiciae1cbe34f54034,
  title = {Photogeologic and reconnaissance geologic map of the Jack Creek Quadrangle, Custer County, Montana},
  author = {S. J. Luft},
  year = {1988},
  doi = {10.3133/mf2018},
  url = {https://pubs.usgs.gov/publication/mf2018},
  note = {Source identifier: mf2018}
}