@misc{indiciae6cf5d45dfb7a,
  title = {Soil-gas helium and radon data from parts of west-central Ventura County, California},
  author = {C.G. Bowles and G.M. Reimer},
  year = {2001},
  doi = {10.3133/ofr01462},
  url = {https://pubs.usgs.gov/publication/ofr01462},
  note = {Source identifier: ofr01462}
}