@misc{indiciaed3c0c21558d5,
  title = {Possible test sites in granite rocks in the United States},
  author = {Donald Clayton Alvord},
  year = {1959},
  doi = {10.3133/tem1024},
  url = {https://pubs.usgs.gov/publication/tem1024},
  note = {Source identifier: tem1024}
}