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. 1949 Oct;11(4):356–359. doi: 10.1136/hrt.11.4.356
THE PHONOCARDIOGRAPHY OF HEART MURMURS Part I.—APPARATUS AND TECHNIQUE
E D H Cowen
1, D H Parnum
1
E D H Cowen
1Department of Medicine, Cambridge University, and the Cambridge Instrument Company
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D H Parnum
1Department of Medicine, Cambridge University, and the Cambridge Instrument Company
Find articles by D H Parnum
1Department of Medicine, Cambridge University, and the Cambridge Instrument Company
PMCID: PMC503639 PMID: 18140348