printed text Africa's Indigenous Technology: with Particular Reference to Nigeria Alex Ikechukwu Okpoko | Ibadan : Wisdom Publishers | 1999 More information... printed text Foundations of Civilization in Tropical Africa Bassey W. Andah ; Alex Ikechukwu Okpoko | Lagos : Centre for Black and African Arts and Civilization | 2009 More information... printed text Imprints of West Africa's Past Bassey W. Andah ; Caleb Adebayo Folorunso ; Alex Ikechukwu Okpoko ; Thurstan Shaw | Ibadan : Wisdom Publishers | 1993 More information...
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