@misc{indiciaef11c62afcd31,
  title = {Errors in measurement of working level.},
  author = {P Loysen},
  year = {1969},
  doi = {10.1097/00004032-196905000-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/5791189/},
  note = {Source identifier: 5791189}
}