@misc{indiciaea92eaa57f1cb,
  title = {Federal coal resource occurrence and coal development potential maps of the Twin Lakes 7 1/2-minute Quadrangle, McKinley County, New Mexico},
  author = {Berge Exploration Inc.},
  year = {1985},
  doi = {10.3133/ofr8030},
  url = {https://pubs.usgs.gov/publication/ofr8030},
  note = {Source identifier: ofr8030}
}