The Russian Empire and Soviet Union: A Guide to Manuscripts and Archival Materials in the United StatesThis guide lists materials in U.S. archives and manuscript repositories that relate to the Russian Empire, Soviet Union, and the many distinct nationalities therein. The materials described in the guide are extremely diverse in character. They cover the broadest possible range of subjects: political, historical, social, economic, diplomatic, artistic, literary, religious, military, musical, and other matters.