books.google.com - Offers chronologically arranged coverage of twentieth-century America, including highlights of the wars, weapon development, the civil rights movement, space exploration, and the telecommunications revolution....http://books.google.com/books/about/America_in_the_20th_Century.html?id=vHA-gP8dPQsC&utm_source=gb-gplus-shareAmerica in the 20th Century
