@misc{indiciae6b67bf7b0833,
  title = {Coal beneath Federal lands in the United States—Mines, reserves, and resources},
  author = {Brian N. Shaffer and Michelle N. Johnston and Scott A. Kinney},
  year = {2026},
  doi = {10.3133/cir1570},
  url = {https://pubs.usgs.gov/publication/cir1570},
  note = {Source identifier: cir1570}
}