共 22 条
[1]
*AM COLL OBST GYN, 1985, STAND OBST GYN SERV, P17
[2]
[Anonymous], 2000, HLTH PEOPL 2010, V2nd
[3]
[Anonymous], MMWR MORB MORTAL WKL
[4]
ATRASH HK, 1990, OBSTET GYNECOL, V76, P1055
[6]
Berg C., 2001, Strategies to reduce pregnancy-related deaths: From identification and review to action
[9]
*CDCP, 2001, MAT MORT COMPL PREGN
[10]
*CDCP, 1991, MMWR-MORBID MORTAL W, V40, P469