@misc{indiciaef3ed7a88e780,
  title = {Man-made air. Problems and limitations.},
  author = {G J DUFFNER},
  year = {1961},
  doi = {10.1177/000348946107000208},
  url = {https://pubmed.ncbi.nlm.nih.gov/13724786/},
  note = {Source identifier: 13724786}
}