@misc{indiciaee9448c0be332,
  title = {Human immunoglobulins: classes, subclasses, genetic variants, and idiotypes.},
  author = {J B Natvig and H G Kunkel},
  year = {1973},
  doi = {10.1016/s0065-2776(08)60295-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/4125921/},
  note = {Source identifier: 4125921}
}