@misc{indiciae61eaa28ddf25,
  title = {An algorithm for determining gestational age from unconjugated estriol levels.},
  author = {J E Buster and A G Freeman and C J Hobel},
  year = {1980},
  url = {https://pubmed.ncbi.nlm.nih.gov/7432738/},
  note = {Source identifier: 7432738}
}