@misc{indiciae059408e190a9,
  title = {Coal resource occurrence map of the Piedra de la Aguila quadrangle, McKinley County, New Mexico},
  author = {Berge Exploration Inc.},
  year = {1979},
  doi = {10.3133/ofr791039},
  url = {https://pubs.usgs.gov/publication/ofr791039},
  note = {Source identifier: ofr791039}
}