21
by Horowitz
Published 2006
22
by STANDISH
Published 1998
23
by Weiss
Published 2000
24
by STUBBS
Published 1994
25
by HEILEMAN
Published 1996
26
by D'ORAZIO
Published 1996
27
by SCHMIDT
Published 1999
28
by Weiss
Published 2002
29
by WATT
Published 2001
30
by Goodrich
Published 2004
31
by Collins
Published 2005
32
by COHOON
Published 2004
33
by ELLZEY
Published 1991
34
by MODEL
Published 1994
35
by ROWE
Published 1998
36
by WIRTH
Published 1991
37
by MARTINER
Published 1999
38
by TENENBAUM
Published 1986
39
by Weiss
Published 1995
40
by Kruse
Published 1991