@misc{indiciaeb36e83c29d5b,
  title = {Coal resource occurrence map of the Hospah quadrangle, McKinley County, New Mexico},
  author = {Berge Exploration Inc.},
  year = {1979},
  doi = {10.3133/ofr79637},
  url = {https://pubs.usgs.gov/publication/ofr79637},
  note = {Source identifier: ofr79637}
}