@misc{indiciae1de6be5eebc6,
  title = {The personal Centripeter--a particle size-selective personal air sampler.},
  author = {W A Langmead and D T O'Connor},
  year = {1969},
  doi = {10.1093/annhyg/12.4.185},
  url = {https://pubmed.ncbi.nlm.nih.gov/5361139/},
  note = {Source identifier: 5361139}
}