@misc{indiciae62e11f92aa6d,
  title = {Principal unconformities in Triassic and Jurassic rocks, western interior United States - A preliminary survey},
  author = {G. N. Pipiringos and Robert Brett O'Sullivan},
  year = {1978},
  doi = {10.3133/pp1035a},
  url = {https://pubs.usgs.gov/publication/pp1035A},
  note = {Source identifier: pp1035A}
}