Não informado. (1974). Journal of Rural Economics and Development. University of Ibadan, Department of Agricultural Extension Services.
Chicago Style (17. basım) AtıfNão informado. Journal of Rural Economics and Development. Ibadan, Nigeria: University of Ibadan, Department of Agricultural Extension Services, 1974.
MLA (8th ed.) AtıfNão informado. Journal of Rural Economics and Development. University of Ibadan, Department of Agricultural Extension Services, 1974.
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