共 60 条
[31]
Lewin K., 1951, FIELD THEORY SOCIAL
[35]
Litwak E., 1985, HELPING ELDERLY COMP
[36]
LITWAK E, 1983, EVALUATING WELFARE S, P338
[37]
MACGUIRE L, 1982, 1981 SOC WELF FOR, P140
[39]
Mitchell JC., 1969, SOCIAL NETWORKS URBA
[40]
MORENO J. L., 1953, WHO SHALL SURVIVE