@misc{indiciaef509ee1221d6,
  title = {The Koyukuk-Chandalar region, Alaska},
  author = {Alfred Geddes Maddren},
  year = {1913},
  doi = {10.3133/b532},
  url = {https://pubs.usgs.gov/publication/b532},
  note = {Source identifier: b532}
}