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Up a level- Subjects (110529)
- 500 Science (23139)
- 500 Science (1257)
- 510 Mathematics (3241)
- 520 Astronomy (52)
- 530 Physics (6429)
- 540 Chemistry (4999)
- 570 Life sciences; biology (4436)
- 580 Plants (botany) (53)
- 590 Animals (zoology) (553)
- 500 Science (23139)
Number of items at this level: 0.