@misc{indiciae81741ce6386a,
  title = {Geologic map of the southwestern part of the Holy Cross quadrangle, Colorado},
  author = {Ogden Linne Tweto},
  year = {1958},
  doi = {10.3133/ofr58105},
  url = {https://pubs.usgs.gov/publication/ofr58105},
  note = {Source identifier: ofr58105}
}