@misc{indiciaea9497c43f1a2,
  title = {Ordovician, Silurian, and Devonian biostratigraphy of east-central Alaska},
  author = {Michael Churkin and Earl E. Brabb},
  year = {1965},
  doi = {10.1306/a6633526-16c0-11d7-8645000102c1865d},
  url = {https://pubs.usgs.gov/publication/70197612},
  note = {Source identifier: 70197612}
}