@misc{indiciaead2268f6c5e5,
  title = {Middle Jurassic (Bathonian) ammonites from southern Alaska},
  author = {Ralph Willard Imlay},
  year = {1980},
  doi = {10.3133/pp1091},
  url = {https://pubs.usgs.gov/publication/pp1091},
  note = {Source identifier: pp1091}
}