TY  - RPRT
TI  - The placenta.
AU  - P Beaconsfield
AU  - G Birdwood
AU  - R Beaconsfield
PY  - 1980
DO  - 10.1038/scientificamerican0880-94
UR  - https://pubmed.ncbi.nlm.nih.gov/7423179/
ID  - 7423179
ER  -