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Up a level- Subjects (117681)
- 500 Science (24129)
- 500 Science (1299)
- 510 Mathematics (3405)
- 520 Astronomy (62)
- 530 Physics (6533)
- 540 Chemistry (5099)
- 570 Life sciences; biology (4559)
- 580 Plants (botany) (60)
- 590 Animals (zoology) (625)
- 500 Science (24129)
Number of items at this level: 0.