@misc{indiciae1e372b2cf0d0,
  title = {The NIOSH detector tube certification program.},
  author = {P Roper},
  year = {1974},
  doi = {10.1080/0002889748507057},
  url = {https://pubmed.ncbi.nlm.nih.gov/4845673/},
  note = {Source identifier: 4845673}
}