Places
- Soviet Union9
- Soviet Union -- History -- 1918-19369
- Soviet Union -- Politics and government -- 1917-19369
- China -- History -- 1928-19378
- Russia -- Social conditions -- 1801-19178
- Soviet Union -- Social conditions8
- United States -- Commerce8
- China -- Foreign relations -- United States7
- Hungary -- History -- 20th century7
- New York (N.Y.) -- Politics and government -- To 18987
- Russia7
- United States -- Politics and government -- 19th century7
- Europe, Eastern6
- Harlem (New York, N.Y.)6
- New York (State) -- Politics and government6
- Russia -- History6
- Russia -- History -- 1904-19146
- Siberia (Russia)6
- Soviet Union -- History,military -- 1917--6
- Soviet Union -- Social life and customs6