@misc{indiciaee880e5ced2ad,
  title = {Isopach, structure contour, and resource maps of the Mahogany oil-shale zone, Green River Formation, Piceance Creek basin, Colorado},
  author = {Janet K. Pitman and R. C. Johnson},
  year = {1978},
  doi = {10.3133/mf958},
  url = {https://pubs.usgs.gov/publication/mf958},
  note = {Source identifier: mf958}
}