Pamphlets, leaflets, serial issues, clippings, other printed matter, correspondence, memoranda, reports, orders, translations, election campaign literature, video and sound recordings, and memorabilia, relating to political, social and economic conditions in Russia, and in the Russian empire as a whole, the Soviet Union as a whole, and the Soviet successor states collectively, and especially to the Russian Revolution and Civil War, American engineers in Russia, and post-1991 elections in Russia.