@misc{indiciaec7196880617d,
  title = {Letter: One thousand vasectomies.},
  author = {E S Livingstone},
  year = {1973},
  doi = {10.1136/bmj.4.5890.489-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/4758469/},
  note = {Source identifier: 4758469}
}