@misc{indiciaee5635c2c5bab,
  title = {Geologic map of the Collegiate Peaks Wilderness Area and the Grizzly Peak Caldera, Sawatch Range, central Colorado},
  author = {C. J. Fridrich and Ed Dewitt and Bruce Bryant and Steve Richard and R. P. Smith},
  year = {1998},
  doi = {10.3133/i2565},
  url = {https://pubs.usgs.gov/publication/i2565},
  note = {Source identifier: i2565}
}