Carr,, Stephen J. Technology for small-scale farmers in Sub-Saharan Africa : experience with food crop production in five major ecological zones / Stephen J. Carr

Technology for small-scale farmers in Sub-Saharan Africa : experience with food crop production in five major ecological zones / Stephen J. Carr . - Washington : The World Bank, 1989 . - XIII, 106 p. 28 cm . - (World Bank technical paper; 109)
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