1
by Ridpath, Ian
Published 1997
2
by Bennett, Jeffrey O.
Published 2000
3
by Baharrudin Zainal
Published 2002
4
by Ronan, Colin A.
Published 2000
5
by Kerrod, Robin
Published 2000
6
by Kerrod, Robin
Published 2000
7
8
by Fraknoi, Andrew
Published 2004
9
by Fraknoi, Andrew
Published 2009
10
by Md Shah
Published 2009
11
by Cooper, Chris
Published 2006
12
by Prinja, Raman, Dr
Published 2004
13
14
by Moore, Patrick
Published 2007
15
by Haines, Tim
Published 2004
16
by Murdin, Paul
Published 2009
17
18
Published 2015
19
by Kassim Bahali
Published 2015
20
Published 2015