@misc{indiciae18acab01fa36,
  title = {Proterozoic geology of the western and southeastern Needle Mountains, Colorado; field trip guidebook},
  author = {David A. Gonzales and C. M. Conway and J. A. Ellingson and J. A. Campbell},
  year = {1994},
  doi = {10.3133/ofr94437},
  url = {https://pubs.usgs.gov/publication/ofr94437},
  note = {Source identifier: ofr94437}
}