@misc{indiciae7d3e9e77b9e1,
  title = {Jurassic ammonites from southern Alaska},
  author = {Ralph W. Imlay},
  year = {1972},
  doi = {10.3133/pp418},
  url = {https://pubs.usgs.gov/publication/pp418},
  note = {Source identifier: pp418}
}