1. Accentuation of the pulmonary second sound: an important sign in the diagnosis of pericarditis Author(s): Warthin, Aldred Scott, 1866-1931, author Publication: Philadelphia : Lea Brothers & Co., [1895] Subject(s): Pericarditis -- diagnosisHeart SoundsHeart Auscultation
2. The application of graphics to the fetal heart sounds Author(s): Hamilton, Hugh, 1847-1923, author Publication: New York : William Wood & Company, 1893 Subject(s): Fetal HeartHeart SoundsPhonocardiography -- instrumentation