Zietz, J. (1988). Agriculture in the GATT: An analysis of alternative approaches to reform. International Food Policy Research Institute.
Lua i Stíl Chicago (17ú heag.)Zietz, Joachim. Agriculture in the GATT: An Analysis of Alternative Approaches to Reform. Washington, D.C: International Food Policy Research Institute, 1988.
Lua MLA (9ú heag.)Zietz, Joachim. Agriculture in the GATT: An Analysis of Alternative Approaches to Reform. International Food Policy Research Institute, 1988.
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