@misc{indiciae4956867de94f,
  title = {Hapten-reactive helper lymphocytes.},
  author = {B Rubin and H Wigzell},
  year = {1973},
  doi = {10.1038/242467a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4540732/},
  note = {Source identifier: 4540732}
}