共 4 条
[1]
Gove S, 1997, B WORLD HEALTH ORGAN, V75, P7
[2]
Makemba AM, 1996, TROP MED INT HEALTH, V1, P305
[3]
National Council for Population and Development, 1999, KEN DEM HLTH SURV 19
[4]
SUSTRINA B, 1993, LANCET, V342, P787