@misc{indiciae0f288926b330,
  title = {Coal resource occurrence and coal development potential maps of the Negro Butte Quadrangle, Johnson and Campbell counties, Wyoming},
  author = {IntraSearch Inc.},
  year = {1979},
  doi = {10.3133/ofr79177},
  url = {https://pubs.usgs.gov/publication/ofr79177},
  note = {Source identifier: ofr79177}
}