@misc{indiciae306053d5f5fb,
  title = {Career service classification.},
  author = {J J DONOVAN},
  year = {1961},
  doi = {10.2105/ajph.51.4.591},
  url = {https://pubmed.ncbi.nlm.nih.gov/13723805/},
  note = {Source identifier: 13723805}
}