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- Africans[remove]20
- Sustainability7
- Economic development2
- Land tenure2
- Medical care2
- Natural resources—Management2
- Political science2
- African Americans--Legal status, laws, etc.1
- Agriculture1
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- Community organization1
- Democracy1
- Ecology1
- Economic assistance, Domestic1
- Economics1
- Education1
- Emigration and immigration law1
- Environmental policy1
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- Exports--Economic aspects1