1
by Wardrop, A. Tucker.
Published 1897
2
Published 1999
3
4
5
by Mohamad Asfia Awang Nassar
Published 2003
6
Published 1984
7
8
by Jones, L. W.
Published 2007
9
Published 1992
10
by Tian, Nong
Published 1977
11
by Nimmo, H. Arlo.
Published 1972
12
13
14
Published 1999
15
16
17
18
by Amde Sidik
Published 2007
19
by Davidson, Leslie, Datuk
Published 2008
20
by Asrul Zamani, Dr.
Published 2002