@misc{indiciaede115e21fe59,
  title = {Lower Devonian graptolites from southeastern Alaska},
  author = {Michael Churkin and Herman Jaeger and G. Donald Eberlein},
  year = {1970},
  doi = {10.1111/j.1502-3931.1970.tb01857.x},
  url = {https://pubs.usgs.gov/publication/70226469},
  note = {Source identifier: 70226469}
}