@misc{indiciaea2e563e8f7bd,
  title = {Map showing extent and total thickness of coal beds in the Kaiparowits coal basin, Utah},
  author = {D. E. Hansen},
  year = {1978},
  doi = {10.3133/i1033c},
  url = {https://pubs.usgs.gov/publication/i1033C},
  note = {Source identifier: i1033C}
}