@misc{indiciae0d37557119af,
  title = {Ammonites of Early Cretaceous age (Valanginian and Hauterivian) from the Pacific Coast States},
  author = {R. W. Imlay},
  year = {1960},
  doi = {10.3133/pp334f},
  url = {https://pubs.usgs.gov/publication/pp334F},
  note = {Source identifier: pp334F}
}