@misc{indiciae55bf48c577fa,
  title = {Daily progestogen for contraception: a clinical study.},
  author = {J Martinez-Manautou and J Giner-Velasquez and V Cortes-Gallegos and R Aznar and B Rojas and A Guitterez-Najar and H W Rudel},
  year = {1967},
  doi = {10.1136/bmj.2.5554.730},
  url = {https://pubmed.ncbi.nlm.nih.gov/4164963/},
  note = {Source identifier: 4164963}
}