Places
- Soviet Union -- History,military -- 1917--6
- Soviet Union -- Politics and government -- 1917-19366
- Ukraine -- History -- Revolution, 1917-19216
- Asia, Central5
- Soviet Union -- Armed forces5
- Soviet Union -- Social life and customs -- 1917-19705
- Russia -- Foreign relations -- 1881-18944
- Russia -- History4
- Russia -- Intellectual life -- 1801-19174
- Russian Far East (Russia)4
- Soviet Union -- History -- 1925-19534
- Soviet Union -- Social conditions -- 1917-19454
- United States -- Emigration and immigration4
- Balkan Peninsula -- History -- War of 1912-19133
- Europe -- Emigration and immigration3
- Russia -- History -- 20th century3
- Russia -- History -- February Revolution, 19173
- Soviet Union -- History -- 1894-19173
- Soviet Union -- Intellectual life3
- Soviet Union -- Social life and customs3