@misc{indiciaeeeb59615dc72,
  title = {Correlation of middle Jurassic and related rocks from Ouray to Black Canyon, western Colorado},
  author = {Robert Brett O'Sullivan},
  year = {1992},
  doi = {10.3133/oc139},
  url = {https://pubs.usgs.gov/publication/oc139},
  note = {Source identifier: oc139}
}