@misc{indiciae9fe378ca2f4b,
  title = {Geology and mineral deposits of the Needle Mountains District, Southwestern Colorado},
  author = {L.J. Schmitt and William H. Raymond},
  year = {1976},
  doi = {10.3133/ofr76244},
  url = {https://pubs.usgs.gov/publication/ofr76244},
  note = {Source identifier: ofr76244}
}