1
by Okposin, Samuel Bassey
Published 2000
2
Published 2007
3
Published 1992
4
Published 2001
5
Published 1996
6
Published 2008
7
Published 2008
8
Published 1971
9
Published 1996
10
11
by Taylor, Ranald J, 1962-
Published 2007
12
by Khor, Kok Peng
Published 1983
13
Published 1995
14
by Ong, Kok Bin
Published 1999
15
by Navaratnam, Ramon V.
Published 1999
16
by Hng, Hung Yong
Published 2003
17
by Okposin, Samuel Bassey
Published 2003
18
19
20
by Hng, Hung Yong
Published 1998