共 8 条
[1]
ARMSTRONG S, 1990, NEW SCI 0331, P50
[3]
BRIGGS ND, 1992, CONT REV OBSTET GYNA, V4, P127
[4]
HARRISON KA, 1991, LANCET, V338, P382
[5]
HARRISON KA, 1992, MASS ILLITERACY IS V
[6]
HARRISON KA, 1985, BR J OBSTET GYNAE S5, V92
[7]
WHITE SM, 1987, LANCET, V2, P612
[8]
1983, LANCET, V1, P223