@misc{indiciaeda0d71cca409,
  title = {Permafrost and ground-water conditions in the Glennallen area, Alaska},
  author = {Donald R. Nichols},
  year = {1956},
  doi = {10.3133/ofr5691},
  url = {https://pubs.usgs.gov/publication/ofr5691},
  note = {Source identifier: ofr5691}
}