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- Dewey Decimal Classification (DDC) (13)
- 600 Technology (Applied sciences) (13)
- 616 Diseases (13)
- 616.9 Other disease (13)
- 616.904 Special topics of communicable diseases (13)
- 616.9 Other disease (13)
- 616 Diseases (13)
- 600 Technology (Applied sciences) (13)
Number of items at this level: 0.