共 25 条
[21]
SNOW RW, 1988, NOV P AFR POP C INT
[22]
STEPHENS J, 1989, METHOD INFORM MED, V28, P155
[23]
White K L, 1985, World Health Stat Q, V38, P2
[24]
1987, WORLD HEALTH FORUM, V8, P409
[25]
HLTH POLICY PLANNING, V6