@misc{indiciae3dad88f5b962,
  title = {Geologic map of the Beck Mountain, Crestone Peak, and Crestone quadrangles, Custer, Huerfano, and Saguache counties, Colorado},
  author = {D. A. Lindsey and B. R. Johnson and S. J. Soulliere and R.M. Bruce and Katrin Hafner},
  year = {1986},
  doi = {10.3133/mf1878},
  url = {https://pubs.usgs.gov/publication/mf1878},
  note = {Source identifier: mf1878}
}