共 6 条
[1]
BLUMEN I, 1955, IND MOBILITY LABOR P, pCH6
[2]
*NAT PLANN ASS, 1952, PENS US
[3]
PALMER GL, 1954, LABOR MOBILITY 6 CIT, P123
[4]
PARNES HS, 1954, RESEARCH LABOR MOBIL, P102
[5]
*US BUR CENS, CURR POP REP LAB P50, V36
[6]
*US BUR CENS, CURR POP REP LAB P50, V65