@misc{indiciae8583572f3ffa,
  title = {WHO collaborative studies on enterovirus reference antisera; fourth report.},
  author = {J L Melnick and B Hampil},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4357975/},
  note = {Source identifier: 4357975}
}