1
by Lipner, Seth E.
Published 1990
2
Published 1997
3
by Hairuddin Megat Latif.
Published 2007
4
by Carr, Indira.
Published 1993
5
6
by Murray, Carole.
Published 2009
7
by Cohen, Stephen D.
Published 1996
8
Published 2000
9
Published 1999
10
Published 2004
11
Published 1983
12
by Narlikar, Amrita
Published 2003
13
Published 1994
14
15
16
17
Published 1989
18
19
by Das, Bhagirath Lal
Published 1998
20
Published 1995