@misc{indiciaeca51667fd9f8,
  title = {Coal resource occurrence map of the La Ventana quadrangle, Sandoval County, New Mexico},
  author = {Berge Exploration Inc.},
  year = {1979},
  doi = {10.3133/ofr791038},
  url = {https://pubs.usgs.gov/publication/ofr791038},
  note = {Source identifier: ofr791038}
}