@misc{indiciaecaad293e4134,
  title = {Factors affecting air flow sampling.},
  author = {J R Johnson and G van Sittert},
  year = {1977},
  doi = {10.1080/0002889778507643},
  url = {https://pubmed.ncbi.nlm.nih.gov/143206/},
  note = {Source identifier: 143206}
}