@misc{indiciae6650ca180a60, title = {ACOUSTIC CHANGES IN NORMALLY FUNCTIONING MITRAL VALVE PROSTHESES: ECHO-PHONOCARDIOGRAPHIC OBSERVATIONS.}, author = {Ulrich Busch and Leonard W. Pechacek and Efrain Garcia and Robert J. Hall}, year = {1978}, url = {https://pubmed.ncbi.nlm.nih.gov/15216061/}, note = {Source identifier: 15216061} }