@misc{indiciae7380418a487e,
  title = {Geology of the Ignacio area, Ignacio and Pagosa Springs quadrangles, La Plata and Archuleta Counties, Colorado},
  author = {Harley Barnes},
  year = {1953},
  doi = {10.3133/om138},
  url = {https://pubs.usgs.gov/publication/om138},
  note = {Source identifier: om138}
}