共 40 条
[11]
CREASY RK, 2009, CREASY RESNICKS MAT
[12]
CUNNINGHAM FG, 1992, NEW ENGL J MED, V326, P927
[18]
HACKER N, 1998, ESSENTIALS OBSTET GY, pCH9
[20]
Helewa ME, 1997, CAN MED ASSOC J, V157, P715