@misc{indiciaead206c748b7e,
  title = {Photogeologic maps of the Bluff 1, 8, and 13 quadrangles, San Juan County, Utah},
  author = {Robert J. Hackman and Richard G. Ray},
  year = {1952},
  doi = {10.3133/ofr5266},
  url = {https://pubs.usgs.gov/publication/ofr5266},
  note = {Source identifier: ofr5266}
}