@misc{indiciae690b83ab5019,
  title = {Three-dimensional heat conduction in permafrost beneath heated buildings},
  author = {Arthur H. Lachenbruch},
  year = {1957},
  doi = {10.3133/b1052b},
  url = {https://pubs.usgs.gov/publication/b1052B},
  note = {Source identifier: b1052B}
}