@misc{indiciae864cd212b6f8,
  title = {The threshold limit value for carbon monoxide.},
  author = {S J Silk},
  year = {1975},
  doi = {10.1093/annhyg/18.1.29},
  url = {https://pubmed.ncbi.nlm.nih.gov/1180452/},
  note = {Source identifier: 1180452}
}