TY  - RPRT
TI  - ACOUSTIC CHANGES IN NORMALLY FUNCTIONING MITRAL VALVE PROSTHESES: ECHO-PHONOCARDIOGRAPHIC OBSERVATIONS.
AU  - Ulrich Busch
AU  - Leonard W. Pechacek
AU  - Efrain Garcia
AU  - Robert J. Hall
PY  - 1978
UR  - https://pubmed.ncbi.nlm.nih.gov/15216061/
ID  - 15216061
ER  -