TY  - RPRT
TI  - Cardiac valve replacement: control trials needed.
AU  - D H Spodick
AU  - A Selxer
PY  - 1976
DO  - 10.1016/s0002-9149(76)80034-3
UR  - https://pubmed.ncbi.nlm.nih.gov/983965/
ID  - 983965
ER  -