共 33 条
[1]
ADAMS JD, 1997, 5940 NAT BUR EC RES
[3]
[Anonymous], 5037 NAT BUR EC RES
[4]
[Anonymous], SURVEY CURRENT BUSIN
[5]
[Anonymous], 1996, POLITICAL EC TRADE P
[6]
[Anonymous], 5958 NAT BUR EC RES
[9]
Blonigen BA, 1997, AM ECON REV, V87, P447
[10]
BOUND J, 1992, AM ECON REV, V82, P371