@misc{indiciaee1ba6830e9a0,
  title = {A compilation of deep earth temperature data, U. S. A. 1910-1945},
  author = {H. Cecil Spicer},
  year = {1964},
  doi = {10.3133/ofr64147},
  url = {https://pubs.usgs.gov/publication/ofr64147},
  note = {Source identifier: ofr64147}
}