1
by Jain
2
by Geddes
Published 1996
3
by Sabaria Datuk Haji Hassan
Published 2011
4
by REVELLE
Published 1997
5
Published 1981
6
Published 1986
7
Published 1994
8
Published 1981
9
Published 1995
10
Published 1989
11
12
by POTTS
Published 1995
13
by SPIGOLON
Published 2001
14
by SCOTT
Published 1958
15
by Vazirani
Published 1996
16
Published 1994
17
Published 1985
18
19
Published 1992
20