Fiess, Norbert; Daniel Lederman. Mexican Corn: The Effects of NAFTA(PDF). Trade Note (The World Bank Group). 2004-11-24, 18 [2007-03-12]. (原始内容(PDF)存档于2007-06-16).引文使用过时参数coauthors (帮助)
worldbank.org
wbln0018.worldbank.org
Fiess, Norbert; Daniel Lederman. Mexican Corn: The Effects of NAFTA(PDF). Trade Note (The World Bank Group). 2004-11-24, 18 [2007-03-12]. (原始内容(PDF)存档于2007-06-16).引文使用过时参数coauthors (帮助)