1
by Barber
Published 2007
2
by MacKinnon
Published 2001
3
Published 1987
4
by SMART
Published 1990
5
by HOROWITZ
Published 1997
6
by KAZANTZIS
Published 1992
7
by WEBB
Published 1980
8
Published 1993
9
by BRZEZINSKI
Published 1993
10
by MacKinnon
Published 1995
11
by MacKinnon
Published 1998
12
by CAHN
Published 1994
13
by KAZANTZIS
Published 1982
14
by TAN LIOK EE
Published 1997
15
by BROWN
Published 1997
16
by HOENSCH
Published 1996
17
Published 1979
18
Published 1991
19
by BARROW
Published 1978
20
by Tomlinson
Published 1991