Before you start more complex research, gain good, grounded background info on your topic.
Click the Gale Ebooks/Gale Virtual Reference Library link below:
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World Food: An Encyclopedia of History, Culture, and Social Influence from Hunter-Gatherers to the Age of Globalization
Food and Drink in American History: A "Full Course" Encyclopedia
by
Food in Context
The SAGE Encyclopedia of Food Issues
by
The Oxford Companion to Food
by