@misc{indiciaebcff52d2cfb3,
  title = {Cowpox in man.},
  author = {H Williams},
  year = {1972},
  doi = {10.1136/vr.90.3.73},
  url = {https://pubmed.ncbi.nlm.nih.gov/5074107/},
  note = {Source identifier: 5074107}
}