@misc{indiciae7a8bfbd4e2a9,
  title = {Fetal lung maturity.},
  author = {W R Walker and N V Simon},
  year = {1987},
  doi = {10.1016/0002-9378(87)90254-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/3799762/},
  note = {Source identifier: 3799762}
}