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Materia
- Agriculture 25
- Natural Resource Management 25
- Horticulture and forestry 14
- History 6
- Law 6
- Botanical Reference 5
- History of Science 4
- Politics and International Relations 4
- Area Studies 3
- Geography 3
- Ecology and Conservation 2
- Economics 2
- Literature 2
- Philosophy 2
- Plant Sciences 2
- Psychology 2
- Archaeology 1
- Art 1
- Climatology and Climate Change 1
- Computer Science 1