Pamphlets, leaflets, serial issues, election campaign literature, other printed matter, reports, memoranda, letters, depositions, and miscellany, relating to political, social and economic conditions in Germany, primarily since the German Revolution of 1918, and relating especially to the Weimar period, post-World War II West German elections and student radicalism, the end of the communist regime in East Germany in 1989, the reunification of Germany in 1990, and post-reunification elections.