@misc{indiciaecf2e12a21780,
  title = {Preliminary geologic map of the Crow Reserve area, Big Horn County, Montana},
  author = {W. J. Mapel},
  year = {1978},
  doi = {10.3133/ofr78998},
  url = {https://pubs.usgs.gov/publication/ofr78998},
  note = {Source identifier: ofr78998}
}