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- Subjects (85998)
- 200 Religion (7504)
- 300 Social sciences (11688)
- 400 Language (2385)
- 500 Science (18182)
- 600 Technology (28384)
- 700 Arts and recreation (2798)
- 800 Literature (1455)
- 900 History and geography (6601)
Number of items at this level: 0.