@misc{indiciaef22ef931a08e,
  title = {Coal resource occurrence and coal development potential maps of the Cowdrey Quadrangle, Jackson County, Colorado},
  author = {AAA Engineering and Drafting Inc.},
  year = {1979},
  doi = {10.3133/ofr79196},
  url = {https://pubs.usgs.gov/publication/ofr79196},
  note = {Source identifier: ofr79196}
}