@misc{indiciaedd3931eefeb8,
  title = {Radon-bearing gas in the Amarillo helium district, Texas},
  author = {James Wilcott Hill},
  year = {1950},
  doi = {10.3133/tem131},
  url = {https://pubs.usgs.gov/publication/tem131},
  note = {Source identifier: tem131}
}