@misc{indiciaefac79505af43,
  title = {Coal resource occurrence and coal development potential maps of the Twentymile Butte Quadrangle, Campbell County, Wyoming},
  author = {IntraSearch Inc.},
  year = {1979},
  doi = {10.3133/ofr7934},
  url = {https://pubs.usgs.gov/publication/ofr7934},
  note = {Source identifier: ofr7934}
}