A method for recording and reproducing fetal heart sounds

[1] BIERRING, 1935, J A M A, V104, P628

[2] BOONE BR, 1939, COMMUNICATION JUN

[3] CASSIO, 1936, AM HEART J, V11, P723

[4] DECOSTA EJ, 1938, JAMA-J AM MED ASSOC, V111, P2008

[5] Mode of production of the first heart sound [J]. ARCHIVES OF INTERNAL MEDICINE, 1933, 51 (05) : 737 - 746

[6] Eckstein RW, 1937, AM J PHYSIOL, V118, P359

[7] HOFBAUER, 1908, ZENTRALBL GYNAK, V22, P429

[8] LEWIS, 1938, J A M A, V110, P271

[9] LIAN, 1938, B SOC OBST GYNEC, V27, P423

[10] MATHEWS HB, 1937, AM J OBSTET GYNECOL, V34, P898

[1] BIERRING, 1935, J A M A, V104, P628

[2] BOONE BR, 1939, COMMUNICATION JUN

[3] CASSIO, 1936, AM HEART J, V11, P723

[4] DECOSTA EJ, 1938, JAMA-J AM MED ASSOC, V111, P2008

[5] Mode of production of the first heart sound [J]. ARCHIVES OF INTERNAL MEDICINE, 1933, 51 (05) : 737 - 746

[6] Eckstein RW, 1937, AM J PHYSIOL, V118, P359

[7] HOFBAUER, 1908, ZENTRALBL GYNAK, V22, P429

[8] LEWIS, 1938, J A M A, V110, P271

[9] LIAN, 1938, B SOC OBST GYNEC, V27, P423

[10] MATHEWS HB, 1937, AM J OBSTET GYNECOL, V34, P898