@misc{indiciaedb68d60745b1,
  title = {[Several reasons for a decrease in vaccinal immunity against diphtheria in school children].},
  author = {M A Zhogova and K S Grigorovich and S V Bogoradova},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/6004851/},
  note = {Source identifier: 6004851}
}