@misc{indiciae02c9bead2d9e,
  title = {Photogeologic map of the Iris SE and Doyleville SW quadrangles, Saguache County, Colorado},
  author = {Kathleen McQueen},
  year = {1958},
  doi = {10.3133/i277},
  url = {https://pubs.usgs.gov/publication/i277},
  note = {Source identifier: i277}
}