共 6 条
[3]
中国农业经济与政策[M]. 中国农业出版社 , 柯炳生, 2005
[5]
The case of the missing trade and other mysteries
[J].
AMERICAN ECONOMIC REVIEW,
1995, 85 (05)
:1029-1046
[6]
National Borders Matter: Canada-U.S. Regional Trade Patterns[J] . John McCallum.The American Economic Review . 1995 (3)