@misc{indiciae1bd0ce7daa19,
  title = {Tabulation of N 2 , O 2 , CO 2 , and He concentrations in soil gases collected regularly for 13 months at a site on the summit of Kilauea Volcano},
  author = {M. E. Hinkle},
  year = {1990},
  doi = {10.3133/ofr90661},
  url = {https://pubs.usgs.gov/publication/ofr90661},
  note = {Source identifier: ofr90661}
}