共 5 条
[2]
KLEIN MD, 1958, AM J OBSTET GYNECOL, V76, P1342
[3]
KRUPP PJ, 1957, AM J OBSTET GYNECOL, V73, P248
[4]
MCCORD JR, 1941, AM J OBST GYNEC, V41, P355
[5]
PORTER J, 1960, OBSTET GYNECOL, V15, P690