@misc{indiciaebe52d9f69c2f,
  title = {Coal resource occurrence and coal development potential maps of the Campbell Hill Quadrangle, Converse and Natrona counties, Wyoming},
  author = {IntraSearch Inc.},
  year = {1979},
  doi = {10.3133/ofr79469},
  url = {https://pubs.usgs.gov/publication/ofr79469},
  note = {Source identifier: ofr79469}
}