1. Phonocardiography of the human fetus;Massman,1926
2. Phonocardiography of the human fetus;Sampson;Amer. Heart J.,1926
3. Organic heart lesion of the fetus in utero;Padgett;South. Practitioner,1894
4. Two cases of congenital heart disease in which diagnosis was made before birth;Dippel;Amer. J. Obstet. Gynec.,1934
5. Antepartum diagnosis of congenital anomaly of the heart;Berrey;Pediatrics,1949