共 2 条
[1]
Investigating the Nature of World Agricultural Competitiveness. Vollrath, Thomas L,and De Huu Vo. U.S. Department of Agriculture, Economic Research Service, Technical Bulletin NO. 1754 . 1988
[2]
Trade liberation and revealed compara-tive advantage. Balassa B. The Manchester School of Eco-nomic and Social Studies . 1965