@misc{indiciae3ebe94c6187a,
  title = {Ammonites from the Buchia zones in northwestern California and southwestern Oregon},
  author = {Ralph Willard Imlay and David Lawrence Jones},
  year = {1970},
  doi = {10.3133/pp647b},
  url = {https://pubs.usgs.gov/publication/pp647B},
  note = {Source identifier: pp647B}
}