@misc{indiciaee19a82a55ab3,
  title = {Mineral resources of Alaska, report on progress of investigations in 1931. Reconnaissance of the northern Koyukuk Valley, Alaska},
  author = {Robert Marshall},
  year = {1934},
  doi = {10.3133/b844e},
  url = {https://pubs.usgs.gov/publication/b844E},
  note = {Source identifier: b844E}
}