@misc{indiciae6eb7c93631e2,
  title = {Coal resource occurrence maps of the Ferris Lake Quadrangle, Carbon County, Wyoming},
  author = {Texas Instruments Incorporated},
  year = {1978},
  doi = {10.3133/ofr7857},
  url = {https://pubs.usgs.gov/publication/ofr7857},
  note = {Source identifier: ofr7857}
}