@misc{indiciae53760e89dab1,
  title = {Coal resource occurrence and coal development potential maps of the Appel Butte Quadrangle, Campbell County, Wyoming},
  author = {IntraSearch Inc.},
  year = {1979},
  doi = {10.3133/ofr7947},
  url = {https://pubs.usgs.gov/publication/ofr7947},
  note = {Source identifier: ofr7947}
}