title: [PHONOCARDIOGRAPHY. HISTORICAL REVIEW OF THE METHODS EMPLOYED].
mesh_terms: D006664:History; D049673:History, 20th Century; D006801:Humans; D010701:Phonocardiography
keywords: HISTORY; HISTORY OF MEDICINE, 20TH CENT.; PHONOCARDIOGRAPHY
vernacular_title: LA PHONOCARDIOGRAPHIE. APER CU HISTORIQUE DES M'ETHODES UTILIS'EES.