@misc{indiciae6f9f4b7956c5,
  title = {Jurassic (Oxfordian and late Callovian) ammonites from the Western Interior region of the United States},
  author = {R. W. Imlay},
  year = {1982},
  doi = {10.3133/pp1232},
  url = {https://pubs.usgs.gov/publication/pp1232},
  note = {Source identifier: pp1232}
}