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- World War, 1939-194572,178
- Women52,858
- Jews46,307
- Education37,507
- Music35,773
- Bible34,232
- World War, 1914-191833,887
- BUSINESS & ECONOMICS31,998
- Politics and government31,805
- Law31,159
- HISTORY27,772
- Communism26,724
- POLITICAL SCIENCE26,361
- Art25,603
- SOCIAL SCIENCE25,162
- Catholic Church24,035
- TECHNOLOGY & ENGINEERING23,320
- Science22,749
- Agriculture21,923
- Motion pictures21,883
