1
by Abah, Cosmas J
Published 2015
2
by Abah, Cosmas J.
Published 2011
3
by Abah, Cosmas J., Datuk Ir.
Published 2010
4
by Abah, Cosmas J., Datuk Ir.
Published 2009
5
by Abah, Cosmas J., Datuk Ir.
Published 2006
6
by Abah, Cosmas J., Datuk Ir.
Published 2009
7
by Abah, Cosmas J., Datuk Ir.
Published 2004
8
Published 2006
Other Authors: ...Abah, Cosmas J., Datuk Ir....
9
Published 1993
Other Authors: ...Abah, Cosmas J., Datuk Ir....