title: [Sound spectrographic studies of normal heart sounds].
mesh_terms: D001021:Aortic Valve; D006801:Humans; D008297:Male; D008722:Methods; D008943:Mitral Valve; D010701:Phonocardiography; D011664:Pulmonary Valve; D014261:Tricuspid Valve
vernacular_title: Schallspektrographische Untersuchungen an normalen Herztönen.