41
Published 2003
42
by TARROW
Published 1989
43
by LAVER
Published 1996
44
by MOORE
Published 1997
45
by POLSBY
Published 1996
46
Published 1995
47
by GRIFFITH
Published 1989
48
by GARVER
Published 1987
49
by VERBA
Published 1985
50
by HOGGART
Published 1991
51
by BEHRSTOCK
Published 1987
52
Published 1996
53
Published 1989
54
by CRAIG
Published 1988
55
by BARADAT
Published 1994
56
by HENDERSON
Published 1998
57
Published 1989
58
by HILL
Published 1990
59
by EVANS
Published 1997
60