@misc{indiciaef288ac86716e,
  title = {Survey of helium in natural water wells and springs in southwest Montana and vicinity, and Imperial Valley, California; Part IV, Jan. 1-Dec. 31, 1981},
  author = {W. P. Doering and Irving Friedman},
  year = {1982},
  doi = {10.3133/ofr82486},
  url = {https://pubs.usgs.gov/publication/ofr82486},
  note = {Source identifier: ofr82486}
}