1
by Sullivan
Published 1992
2
Published 2008
3
by Ricklefs
Published 1993
4
5
by Bovem
Published 1993
6
by Nik Anuar Nik Mahmud
Published 2000
7
by Ziegenhain
Published 2008
8
by Sajoo
Published 1994
9
by Yunus
Published 1995
10
by Gibson
Published 2007
11
by Yunus
Published 1995
12
by Thaba
Published 1996
13
14
by Suryadinata
Published 1981
15
by Omar, 1949-
Published 1993
16
17
by Forbes
Published 1995
18
19
by Porter
Published 2002
20
by Bovem
Published 1993