41
Published 1994
42
by Fennessy, R. R.
Published 1963
43
Published 1970
44
by Polsby, Nelson W
Published 1980
45
Published 1979
46
by Needham, Douglas
Published 1983
47
by Chin, Yoong Kheong
Published 1994
48
by Kissinger, Henry, 1923-
Published 1979
49
by Van Creveld, Martin L.
Published 1993
50
Published 1994
51
by Kent, Glenn A, 1915-
Published 1984
52
by Mohamed Yusoff Ismail.
Published 1993
53
by Wilkinson, Paul, 1937-
Published 1974
54
by Harris, Peter Bernard
Published 1975
55
Published 1991
56
Published 1978
57
58
Published 2002
59
by Harrod, Roy, Sir, 1900-
Published 1965
60
Published 1996