Looking for even MORE primary sources? Check out the history research guides from the UW Seattle Campus. On the left side the page, click on "History by Region" and then follow the Primary Sources link on that sub-guide. Or follow "Primary Sources by Type" and then choose a category.
Access primary sources related to a variety of global commodities
YouTube is a great source for finding interviews with people involved in the production of your commodity.
You may also find interviews in newspapers or documentaries about your commodity.