TY  - RPRT
TI  - A quantitative stethoscope and its clinical applications.
AU  - E LEPESCHKIN
PY  - 1952
DO  - 10.1016/0002-8703(52)90243-3
UR  - https://pubmed.ncbi.nlm.nih.gov/14933294/
ID  - 14933294
ER  -