@misc{indiciaef13ccdd48076,
  title = {Mineral resources of the Black Canyon and South Piney Creek Wilderness Study Areas, Saguache County, Colorado},
  author = {David A. Lindsey and J.R. Hassemer and G. A. Abrams and R. B. Taylor and B.J. Hannigan},
  year = {1985},
  doi = {10.3133/b1716a},
  url = {https://pubs.usgs.gov/publication/b1716A},
  note = {Source identifier: b1716A}
}