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- Library of Congress Subject Areas (18)
- 23rd Dewey Decimal Classification (18)
- 500 – Ilmu Pengetahuan (18)
- 510 - Matematika (2)
- 540 - Kimia (7)
- 570 - Biologi (5)
- 580 Tanaman (4)
- 500 – Ilmu Pengetahuan (18)
- 23rd Dewey Decimal Classification (18)
Number of items at this level: 0.