Bulgaria - Wheat production.
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| Format: | Texto biblioteca |
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1960
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| Subjects: | CULTURAL METHODS, VARIETIES, PLANT PRODUCTION, WHEATS, AGRICULTURAL ECONOMICS, MODE DE CULTURE, VARIETE, PRODUCTION VEGETALE, BLE, METODOS DE CULTIVO, VARIEDADES, PRODUCCION VEGETAL, TRIGO, ECONOMIE AGRICOLE, ECONOMIA AGRICOLA, |
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