1
2
by Colley, Jr.
Published 2002
3
by Das
Published 1986
4
by Pearson
Published 1990
5
by Rugman
Published 1990
6
by Wheelen
Published 1992
7
by Foo
Published 1994
8
9
10
Published 1989
11
by Sellamy
Published 2006
12
by Gao
Published 1991
13
by Ong
Published 1997
14
by Lawler
Published 1990
15
16
17
by Hoffherr
Published 1994
18
by Leavy
Published 1994
19
by Booth
Published 1993
20