OCB Students and faculty may arrange access to the Bloomberg Terminal to search for commodities data. Up to date as well as historical (though generally not before 1989) international data on commodities. Frequency varies but is typically daily for financial information and in some cases intradaily. Intradaily data is typically kept from 30 to 90 days only. Downloading is extremely limited. Contact a business librarian for more information.
Commodities by 
Commodity Exchanges: Concepts, Tools and Guidelines by