Clinical diagnosis of congenital heart murmurs by means of the symballophone; a double stethoscope making use of two ears for lateralization and comparison of sounds.

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@article{Kerr1950ClinicalDO, title={Clinical diagnosis of congenital heart murmurs by means of the symballophone; a double stethoscope making use of two ears for lateralization and comparison of sounds.}, author={Whitney J Kerr}, journal={The Journal of pediatrics}, year={1950}, volume={37 4}, pages={569-73} }