@misc{indiciaef80a3a0c42bc,
  title = {Geology of the Huerfano Park area, Huerfano and Custer Counties, Colorado},
  author = {Ross Byron Johnson},
  year = {1959},
  doi = {10.3133/b1071d},
  url = {https://pubs.usgs.gov/publication/b1071D},
  note = {Source identifier: b1071D}
}