共 5 条
[1]
ADAIR FL, 1940, OBSTET GYNECOL, V1, P700
[2]
BALND PB, 1939, PRACTICAL OBSTETRICS, P345
[4]
SCHUMANN EA, 1936, TXB OBSTETRICS, P345
[5]
SCHUMANN EA, 1928, EXTRA UTERINE PREGEN, P216