1
by Shields
Published 2007
2
3
by Hagemann
Published 1992
4
by Hacker
Published 1997
5
by Miller
Published 1993
6
by Campbell
Published 1990
7
by Goren
Published 1990
8
9
by Kushel
Published 1994
10
11
12
by Thornely
Published 1993
13
by Tack
Published 1984
14
by Kuczmarski
Published 1995
15
by Barrett
Published 1998
16
17
by McClelland
Published 2008
18
by DuBrin
Published 2010
19
20