Comtrade provides commodity trade data for all available countries and areas since 1962. Free access (with restrictions) for guest user
United Nations: International trade statistics yearbook [print]
Provides information relevant to the external trade performance of approximately 180 countries or areas and highlights world trade of selected commodities. Library holds volumes for 1983 up to (currently) 2010.
World Bank: WDI online [electronic - access restricted to UofA users]
Access to World Bank economic, social & natural resources indicators of development
World Bank: WDI Little Green Data Book 2010 (electronic resource: University of Adelaide users only)
Data on agriculture, biodiversity, energy, emissions and pollution, water and sanitation, environment and health, and national accounting aggregates