@misc{indiciaea82791643a4a,
  title = {IMMUNIZATION AGAINST TYPHOID AND PARATYPHOID FEVERS.},
  author = {M T ASHCROFT},
  year = {1964},
  doi = {10.1177/000992286400300703},
  url = {https://pubmed.ncbi.nlm.nih.gov/14192459/},
  note = {Source identifier: 14192459}
}