American Decades cover American Decades Primary Sources, Vol. 11 cover Bowling, Beatniks, and Bell-Bottoms, ed. 2: Pop Culture of 20th- and 21st-Century America cover Encyclopedia of American Environmental History cover History Behind the Headlines: The Origins of Conflicts Worldwide cover New Dictionary of the History of Ideas cover The Middle Ages: An Encyclopedia for Students cover UXL Encyclopedia of U.S. History cover World History Encyclopedia cover