500 Science
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- Subjects (84757)
- 500 Science (17999)
- 500 Science (1152)
- 510 Mathematics (2423)
- 520 Astronomy (39)
- 530 Physics (4715)
- 540 Chemistry (3914)
- 570 Life sciences; biology (3640)
- 580 Plants (botany) (45)
- 590 Animals (zoology) (530)
- 500 Science (17999)
Number of items at this level: 0.