21
by Ward, Barbara
Published 1959
22
by Tessensohn, Denyse
Published 1992
23
by Fung, D. Y. K.
Published 1999
24
by Stoessinger, John G.
Published 1965
25
Published 1992
26
by Edmead, Frank
Published 1971
27
by Qureshi, Asif H, 1956-
Published 1996
28
Published 1997
29
by Kessler, Clive S, 1942-
Published 1978
30
by Kennedy, Gavin.
Published 1974
31
by Cohen, Martin
Published 2001
32
Published 1992
33
by Gross, Ernest A.
Published 1962
34
Published 1996
35
by Black, Cyril E.
Published 1968
36
by Kennan, George Frost, 1904-
Published 1964
37
by Turner, Harold A.
Published 1966
38
by Aksu, Esref, 1969-
Published 2003
39
Published 2005
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40
by Laswell, Harold
Published 1965