@misc{indiciae32bffc1b0df1,
  title = {Photogeologic map, Elk Ridge 2 quadrangle, San Juan County, Utah},
  author = {Robert J. Hackman},
  year = {1954},
  doi = {10.3133/ofr54113},
  url = {https://pubs.usgs.gov/publication/ofr54113},
  note = {Source identifier: ofr54113}
}