Indigenous technology :
Igwe, Agbafor.
Indigenous technology : the developmental philosophy of Ogbonnaya Onu / by Agbafor Igwe. - Enugu, Nigeria : Fourth Dimension Pub. Co., 1994. - xiii, 174 p. ; 21 cm.
Indigenous technology : the developmental philosophy of Ogbonnaya Onu / by Agbafor Igwe. - Enugu, Nigeria : Fourth Dimension Pub. Co., 1994. - xiii, 174 p. ; 21 cm.