Credo is an academic alternative to Wikipedia. It includes topic pages with mind maps (examples: agriculture, cattle, and organic food) and specialized entries from several encyclopedias, dictionaries, and other reference sources (example: Food Justice, from Encyclopedia of Diversity and Social Justice and Fishing and Fish Stocks from Global Social Issues: An Encyclopedia).
The databases featured in this box are particularly useful for this class. You can learn more about databases on the Research Hub.
Try some of these subject headings in WorldCat:
Food supply United States | Sustainable agriculture | Corn history | Sustainable Living| Meat industry and trade | Food industry and trade | Natural foods | Food marketing | Agriculture Environmental aspects | Food habits | Food consumption| Agricultural innovations social aspects | Feeding Behavior | Food Preferences