TY  - RPRT
TI  - New method for analyzing heart vibrations. I. Low frequency vibrations.
AU  - C M AGRESS
AU  - L G FIELDS
PY  - 1959
DO  - 10.1016/0002-9149(59)90246-2
UR  - https://pubmed.ncbi.nlm.nih.gov/13670119/
ID  - 13670119
ER  -