@misc{indiciae83c9aef4c5f6,
  title = {Mineral resources of the Papa Keal and Zapata Creek Wilderness Study Areas, Alamosa County, Colorado},
  author = {Bruce R. Johnson and Jerry R. Hassemer and Brian J. Hannigan},
  year = {1986},
  doi = {10.3133/b1716d},
  url = {https://pubs.usgs.gov/publication/b1716D},
  note = {Source identifier: b1716D}
}