@misc{indiciae5ead52ee6b2e,
  title = {A detailed study of the USGS reducing-gas sensor with field tests at Long Valley, California},
  author = {K.A. McGee and A. J. Sutton},
  year = {1990},
  doi = {10.3133/ofr9061},
  url = {https://pubs.usgs.gov/publication/ofr9061},
  note = {Source identifier: ofr9061}
}