@misc{indiciaef0e0b18b54a4,
  title = {Diurnal effects on the helium concentration in soil-gas and near-surface atmosphere},
  author = {G. Michael Reimer and Alan A. Roberts and E.H. Denton},
  year = {1976},
  doi = {10.3133/ofr76715},
  url = {https://pubs.usgs.gov/publication/ofr76715},
  note = {Source identifier: ofr76715}
}