@misc{indiciae512becab1a3c,
  title = {Graptolite succession across the Ordovician–Silurian boundary in south-eastern Alaska},
  author = {Michael Churkin and Claire Carter and George Donald Eberlein},
  year = {2022},
  doi = {10.1144/gsjgs.126.1.0319},
  url = {https://pubs.usgs.gov/publication/70226160},
  note = {Source identifier: 70226160}
}