AU  - Donaldson JB
TI  - A stethoscope of increased sensitiveness
PT  - JOUR
DP  - 1919
TA  - Journal of the American Medical Association
pages = {1303},
VI  - 73
IP  - 17
AID  - 10.1001/jama.1919.02610430051027 [doi]
4100  - http://dx.doi.org/10.1001/jama.1919.02610430051027
SO  - Journal of the American Medical Association October 25, 1919 73(17):1303