@misc{indiciaeff7d28a4a0cf,
  title = {A hierarchical coding system for occupational exposure.},
  author = {A R Keefe and J R Grace and P R Band and J L Bert and K Teschke and L M Svirchev and J J Spinelli},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/2016651/},
  note = {Source identifier: 2016651}
}