@misc{indiciae2648001d616b,
  title = {The placenta.},
  author = {P Beaconsfield and G Birdwood and R Beaconsfield},
  year = {1980},
  doi = {10.1038/scientificamerican0880-94},
  url = {https://pubmed.ncbi.nlm.nih.gov/7423179/},
  note = {Source identifier: 7423179}
}