TY  - RPRT
TI  - Cardiac performance during pregnancy: serial evaluation using external systolic time intervals.
AU  - P R Liebson
AU  - L I Mann
AU  - M I Evans
AU  - S Duchin
AU  - L Arditi
PY  - 1975
DO  - 10.1016/0002-9378(75)90606-7
UR  - https://pubmed.ncbi.nlm.nih.gov/1130438/
ID  - 1130438
ER  -