@misc{indiciaefc12fd5fac37,
  title = {Reconnaissance geologic map of the Royal Gorge Quadrangle, Fremont and Custer counties, Colorado},
  author = {R. B. Taylor and G. R. Scott and R. A. Wobus and R.C. Epis},
  year = {1975},
  doi = {10.3133/i869},
  url = {https://pubs.usgs.gov/publication/i869},
  note = {Source identifier: i869}
}