@misc{indiciaea0ad8f97b886,
  title = {WHO collaborative studies on enterovirus reference antisera: second report.},
  author = {B Hampil and J L Melnick},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/4299693/},
  note = {Source identifier: 4299693}
}