@misc{indiciae9bb661841747,
  title = {Sero-conversion following DPT immunization.},
  author = {S N Ray and K Ray and S S Grover and M Mohan and B S Misra and S P Sharma},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/680916/},
  note = {Source identifier: 680916}
}