@misc{indiciaea058d3f7f68b,
  title = {One-year contraception with norgestrienone subdermal silastic implants.},
  author = {E M Coutinho and A R da Silva},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4811085/},
  note = {Source identifier: 4811085}
}