1
Published 2008
2
Published 2007
3
by Taylor, Mark C
Published 2007
4
Published 2008
5
Published 1999
6
Published 2008
7
8
by Schuon
Published 1984
9
by Tong
Published 2003
10
by Cahn
Published 2006
11
Published 2008
12
Published 1993
13
Published 1993
14
Published 1994
15
by Davie
Published 1994
16
by Holm
Published 1991
17
Published 1988
18
by Sherif Ayoub
Published 2014
19
by Hughes
Published 2012
20
by Lings
Published 2006