@misc{indiciae49628f669b34,
  title = {Immunization against pregnancy.},
  author = {J P Hearn},
  year = {1976},
  doi = {10.1098/rspb.1976.0105},
  url = {https://pubmed.ncbi.nlm.nih.gov/13376/},
  note = {Source identifier: 13376}
}