@misc{indiciaeb276b5581fc2,
  title = {Preliminary report on analyses of Cretaceous coals from northwestern Alaska},
  author = {James E. Callahan and E.G. Sloan},
  year = {1978},
  doi = {10.3133/ofr78319},
  url = {https://pubs.usgs.gov/publication/ofr78319},
  note = {Source identifier: ofr78319}
}