@misc{indiciaebd81c0964526,
  title = {Periodic heat flow in a stratified medium with application to permafrost problems},
  author = {A.H. Lachenbruch},
  year = {1959},
  doi = {10.3133/b1083a},
  url = {https://pubs.usgs.gov/publication/b1083A},
  note = {Source identifier: b1083A}
}