TY  - RPRT
TI  - A multi-channel cathode-ray phonocardiograph.
AU  - E M BESTERMAN
AU  - J K HARRIS
PY  - 1953
DO  - 10.1136/hrt.15.2.130
UR  - https://pubmed.ncbi.nlm.nih.gov/13041991/
ID  - 13041991
ER  -