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.
authors.forename: W J
authors.initials: WJ
authors.lastname: KERR
mesh_terms: D006337:Heart Murmurs; D006347:Heart Sounds; D006801:Humans; D019023:Stethoscopes