1
by Butler, David, 1924-
Published 1963
2
by Ranney, Austin
Published 1965
3
Published 2002
4
by Black, Duncan
Published 1963
5
by Ratnam, K. J
Published 1967
6
by Lakeman, Enid
Published 1955
7
by McLean, Iain
Published 1989
8
Published 1995
9
by Lijphart, Arend
Published 1994
10
by Jacobson, Gary C
Published 1990
11
by Norpoth, Helmut
Published 1992
12
13
Published 1990