@misc{indiciaeea91ffab8f46,
  title = {Compilation of geothermal-gradient data in the conterminous United States},
  author = {Manuel Nathenson and Marianne Guffanti},
  year = {1987},
  doi = {10.3133/ofr87592},
  url = {https://pubs.usgs.gov/publication/ofr87592},
  note = {Source identifier: ofr87592}
}