TY  - RPRT
TI  - The fetal electrocardiogram.
AU  - M WONG
AU  - D E CASSELS
PY  - 1960
DO  - 10.1001/archpedi.1960.02070030006002
UR  - https://pubmed.ncbi.nlm.nih.gov/13845799/
ID  - 13845799
ER  -