@misc{indiciae5215ae312aeb,
  title = {Primary amenorrhoea.},
  author = {W P Black},
  year = {1977},
  doi = {10.1136/bmj.2.6081.262-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/884463/},
  note = {Source identifier: 884463}
}