The emperors of chocolate inside the secret world of Hershey and Mars - Brenner, Joel Glenn (New York Random House, 1999)
Keywords: Hershey, Milton Snavely -- 1857-1945.; Mars, Forrest; Hershey Foods Corporation -- History; Mars, Incorporated -- History; Chocolate industry -- History. -- United States; Candy industry -- History. -- United States; Chocolate candy -- Marketing -- History. -- United States; Competition -- United States -- Case studies