1
by Yeo
Published 1990
2
3
by Yong, Paul, 1936-
Published 1991
4
by Chew, 1953-
Published 1990
5
by Chin, Ung-Ho, 1967-
Published 1996
6
by Chan
Published 1982
7
8
by Yong, C. F
Published 1990