@misc{indiciaef80d92492526,
  title = {Preliminary geologic map of the Kirtland quadrangle, San Juan County, New Mexico},
  author = {E. C. Beaumont and Robert Brett O'Sullivan},
  year = {1955},
  doi = {10.3133/coal32},
  url = {https://pubs.usgs.gov/publication/coal32},
  note = {Source identifier: coal32}
}