@misc{indiciae95a8c10ad929,
  title = {The coal-bearing group in the Nenana coal field, Alaska},
  author = {Clyde Wahrhaftig and J. A. Wolfe and E. B. Leopold and M. A. Lanphere},
  year = {1969},
  doi = {10.3133/b1274d},
  url = {https://pubs.usgs.gov/publication/b1274D},
  note = {Source identifier: b1274D}
}