TY  - RPRT
TI  - COMPARATIVE EFFICIENCY OF STETHOSCOPES.
AU  - D GROOM
PY  - 1964
DO  - 10.1016/0002-8703(64)90043-2
UR  - https://pubmed.ncbi.nlm.nih.gov/14204317/
ID  - 14204317
ER  -