21
by Hoyt, Edwin Palmer.
Published 1988
22
23
24
25
by McClellan, Woodford.
Published 1994
26
by Moss, Walter.
Published 1997
27
28
29
30
31
Published 1998
32
by Ayandele, Emmanuel Ayankanmi.
Published 1979
33
by Harris, Lillian Craig.
Published 1986
34
by Fage, J. D.
Published 1978
35
by Hirst, David, 1936-
Published 1981
36
by Holt, P. M
Published 1979
37
Published 1991
38
by Gordon, David Crockett.
Published 1979
39
by Kissinger, Henry, 1923-
Published 1979
40
by Kissinger, Henry, 1923-
Published 1982