@misc{indiciaeb060e8ea029c,
  title = {Coal resource occurrence map of the El Dado quadrangle, McKinley County, New Mexico},
  author = {Berge Exploration Inc.},
  year = {1979},
  doi = {10.3133/ofr79634},
  url = {https://pubs.usgs.gov/publication/ofr79634},
  note = {Source identifier: ofr79634}
}