@misc{indiciaedc0b8a6180e5,
  title = {Map showing the areal distribution of oil shales with associated mineral resources and metal anomalies in the Western United States and Alaska},
  author = {L.J. Schmitt},
  year = {1989},
  doi = {10.3133/mf2091},
  url = {https://pubs.usgs.gov/publication/mf2091},
  note = {Source identifier: mf2091}
}