共 26 条
[1]
[Anonymous], ECONOMETRIC ANAL
[4]
Barr S. Z., 1980, COMMUNITY JUNIOR COL, V4, P219
[5]
Becker WE, 1997, J ECON LIT, V35, P1347
[7]
Borg M.O., 1989, Journal of Economic Education, V20, P309
[10]
DORANS NJ, 1999, 991 COLL BOARD RES