@misc{indiciaec58329d693e4,
  title = {The use of Vacutainer tubes for collection of soil samples for helium analysis},
  author = {Margaret Hinkle and James E. Kilburn},
  year = {1979},
  doi = {10.3133/ofr791441},
  url = {https://pubs.usgs.gov/publication/ofr791441},
  note = {Source identifier: ofr791441}
}