Regionalization particular to each production problem.
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| Format: | Texto biblioteca |
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1969
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| Subjects: | RU AER, PRODUCTION, RESEARCH PROJECTS, AGRICULTURAL DEVELOPMENT, RESEARCH, AFRICA SOUTH OF SAHARA, PROJET DE RECHERCHE, PRODUCCION, PROYECTOS DE INVESTIGACION, DEVELOPPEMENT AGRICOLE, RECHERCHE, AFRIQUE AU SUD DU SAHARA, DESARROLLO AGRICOLA, INVESTIGACION, AFRICA AL SUR DEL SAHARA, |
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