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- World War, 1939-194572,198
- Women52,870
- Jews46,326
- Education37,520
- Music35,781
- Bible34,236
- World War, 1914-191833,891
- BUSINESS & ECONOMICS31,998
- Politics and government31,840
- Law31,164
- HISTORY27,773
- Communism26,727
- POLITICAL SCIENCE26,361
- Art25,609
- SOCIAL SCIENCE25,162
- Catholic Church24,036
- TECHNOLOGY & ENGINEERING23,320
- Science22,751
- Agriculture21,926
- Motion pictures21,893
