TY  - RPRT
TI  - The fetal circulation.
AU  - A M Rudolph
AU  - M A Heymann
PY  - 1968
DO  - 10.1146/annurev.me.19.020168.001211
UR  - https://pubmed.ncbi.nlm.nih.gov/4871686/
ID  - 4871686
ER  -