Okpoko, A.I. <br/><br/>
Africas indigenous technology: 

 - Ibadan   Wisdom  1999 
 - 214p.:ill.;  pbk 
<br/><br/><label>ISBN: </label>9782823147 
<br/><br/><label>Subjects--Topical Terms: </label><br/>with particular reference to Nigeria--Technology - prumitive - Nigeria--Technologicaln innovation - Nigeria