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- Library of Congress Subject Areas (1)
- 23rd Dewey Decimal Classification (1)
- 500 – Ilmu Pengetahuan (1)
- 550 - Ilmu bumi dan geologi (1)
- 500 – Ilmu Pengetahuan (1)
- 23rd Dewey Decimal Classification (1)
Number of items at this level: 0.
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