@misc{indiciaea7a21f1304f3,
  title = {Recommendations on smallpox immunization.},
  author = {E A Piszczek and E L Stebbins and J Adriani and G F Lull and O K Niess},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4404741/},
  note = {Source identifier: 4404741}
}