@misc{indiciae1f460ff3515b,
  title = {Coal resource occurrence and coal development potential maps of the Gillam Draw Quadrangle, Rio Blanco County, Colorado},
  author = {AAA Engineering and Drafting Inc.},
  year = {1979},
  doi = {10.3133/ofr791419},
  url = {https://pubs.usgs.gov/publication/ofr791419},
  note = {Source identifier: ofr791419}
}