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Okoye, B.C and Asumugha, G.N and Okezie, C.A and Tanko, L and Onyenweaku, C.E (2006): Econometric Assessment of the Trend in Cocoyam Production in Nigeria, 1960/61-2003/2006. Published in: Agricultural Journal , Vol. 3, No. 2 (2008): pp. 99-101.
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