@misc{indiciaecd84b5f75a0d,
  title = {Nomenclature of Precambrian rocks in Colorado},
  author = {Ogden Linne Tweto},
  year = {1977},
  doi = {10.3133/b1422d},
  url = {https://pubs.usgs.gov/publication/b1422D},
  note = {Source identifier: b1422D}
}