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WikiPedia: อาหาร http://www.britannica.com/EBchecked/topic/212568/f... http://www.chemistryexplained.com/Fe-Ge/Food-Prese... http://edition.cnn.com/2009/WORLD/europe/11/17/ita... http://www.ibisworld.com/newsletter/issues/us/08ma... http://www.medicalnewstoday.com/articles/28063.php http://www.reuters.com/article/idUSTRE57652C200908... http://www.foodsafety.gov/keep/basics/index.html http://www.niaid.nih.gov/publications/pdf/foodalle... http://www.ers.usda.gov/Briefing/ http://www.fsis.usda.gov/Fact_Sheets/Chicken_Food_...