@misc{indiciaea672f09f93f0,
  title = {An improved 222Rn canister using a two-stage charcoal system.},
  author = {S C Scarpitta and N H Harley},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1989939/},
  note = {Source identifier: 1989939}
}