1
Published 1995
2
by Thomas
Published 1983
3
by Russell
Published 2003
4
5
Published 1991
6
Published 1996
7
by Liang
Published 1997
8
by Penn
Published 1994
9
by Pugh
Published 1964
10
11
Published 1979
12
13
by Jones
Published 1980
14
Published 1988
15
by Atherton
Published 1985
16
17
by Smith
Published 2007
18
Published 1992
19
by Sheppard, Mubin
Published 1962
20
Published 2011