@misc{indiciaee535037e7fd7,
  title = {Viral hepatitis, type B (MS-2 strain). Studies on active immunization.},
  author = {S Krugman and J P Giles and J Hammond},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/4996665/},
  note = {Source identifier: 4996665}
}