@misc{indiciaef59740bc07c7,
  title = {Map showing amount of overburden of major coal zones in the Kaiparowits coal-basin area, Utah},
  author = {Dan E. Hansen},
  year = {1978},
  doi = {10.3133/i1033d},
  url = {https://pubs.usgs.gov/publication/i1033D},
  note = {Source identifier: i1033D}
}