TY  - RPRT
TI  - NORMAL FETAL ELECTROCARDIOGRAM, STATISTICAL DATA AND REPRESENTATIVE WAVEFORMS.
AU  - S D LARKS
AU  - G G LARKS
PY  - 1964
DO  - 10.1016/0002-9378(64)90859-2
UR  - https://pubmed.ncbi.nlm.nih.gov/14233696/
ID  - 14233696
ER  -