共 64 条
[1]
BEALS E, 1970, OXFORD ECONOMIC PAPE, V21, P109
[4]
BERG EJ, 1970, 1 U MICH CTR RES EC
[5]
BERRY AR, 1969, J POLITICAL EC, V77, P778
[6]
BERRY SS, 1970, AFRICAN URBAN NOTES, V5, P144
[7]
BISHOP CE, 1961, LABOR MOBILITY POPUL
[9]
BRANNON RH, UNPUBLISHED PAPER
[10]
BRIGG PH, 1971, 107 EC STAFF WORK PA