共 6 条
[1]
ALTHUISIUS SM, 2001, CERVICAL INCOMPETENC, P70
[2]
CULPEPER N, 1655, PRACTICE PHYFICK, P502
[3]
Grant A., 1989, EFFECTIVE CARE PREGN, P633
[4]
Gream GT., 1865, LANCET, V85, P381