Agricultural production, ecological limits and possibilities : contribution to the Sahel ecology, economy and demography study / Sonja van der Graaf and Henk Breman
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Agricultural production, ecological limits and possibilities : contribution to the Sahel ecology, economy and demography study / Sonja van der Graaf and Henk Breman
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Prepared for the Club du Sahel
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Agricultural production, ecolo ...... , economy and demography study
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Agricultural production, ecolo ...... van der Graaf and Henk Breman