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An agro-ecological framework for integrated nutrient management, with special reference to Kenya / Eric Smaling.
- s.n.],
- 1993.
- [S.l. :
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Ãnergie et développement rural du Tiers-monde : problèmes et perspectives = Energy and rural development in the Third world : problems and perspectives / Eric Lagandré.
- s.n.],
- 1983.
- [Paris :