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- Dewey Decimal Classification (DDC) (1)
- 300 Social sciences (1)
- 333 Economics of land and energy (1)
- 333.9 Other natural resources (1)
- 333.95 Biological resources (1)
- 333.959 Specific kinds of mammals (1)
- 333.95 Biological resources (1)
- 333.9 Other natural resources (1)
- 333 Economics of land and energy (1)
- 300 Social sciences (1)
Number of items at this level: 0.