@misc{indiciaedb129389cd09,
  title = {Coal deposits in the valley of Healy River, Alaska},
  author = {C. Wahrhaftig and J. Freedman},
  year = {1945},
  doi = {10.3133/ofr45101},
  url = {https://pubs.usgs.gov/publication/ofr45101},
  note = {Source identifier: ofr45101}
}