@misc{indiciae86111d2f58e0,
  title = {Federal coal resource occurrence and federal coal development potential maps of the Blocker 7.5-minute quadrangle, Pittsburg and Latimer Counties, Oklahoma},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1985},
  doi = {10.3133/ofr79302},
  url = {https://pubs.usgs.gov/publication/ofr79302},
  note = {Source identifier: ofr79302}
}