共 4 条
[1]
CANNELL C, COLLECTION DATA INTE, pCH8
[2]
FESTINGER L, 1953, RES METHODS BEHAV SC, P230
[3]
FRIEDMANN EA, 1954, MEANING WORK RETIREM, P183
[4]
U.S. Bureau of the Census, 1950, ALPH IND OCC IND 195