Abdullahi,A.K Proceedinds of Techno- expo2000/by Print resources Abdullahi A.K - Maitama District Raw material research 2002 - x,112p. ill. 23cm includes index ISBN: FUTML Standard No.: FUTML Source: R-26645 Subjects--Personal Names: Ado,K.A. LC Class. No.: T10.7.R38