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- Marine resources conservation
- Law and legislation 8
- Economic aspects 6
- Marine pollution 6
- Marine resources 6
- Marine resources development 4
- Coastal zone management 3
- Law of the sea 3
- Management 3
- Marine ecology 3
- Environmental aspects 2
- Environmental conditions 2
- History 2
- Human ecology 2
- Maritime law 2
- Antiquities 1
- Archaeology and history 1
- Chemical oceanography 1
- Climatic changes 1
- Ecosystem management 1
- Excavations (Archaeology) 1
- Fisheries 1
- Fishers 1
- Fishery law and legislation 1
- Government policy 1
- Indians of North America 1
- International cooperation 1
- International status 1
- Marine ecosystem management 1
- Natural history 1
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