61
by Christopher, Robert C, 1924-
Published 1983
62
Published 2003
63
Published 2003
64
Published 1997
65
by Hu, Angang.
Published 2011
66
by Gusni Saat
Published 2004
67
by Amalrik, Andrei, 1938-
Published 1970
68
Published 1990
69
by Chang, Gordon G.
Published 2001
70
Published 1984
71
Published 1994
72
Published 1993
73
by Pettus, Ashley
Published 2003
74
Published 1992
75
by Hanley, D. L, 1944-
Published 1979
76
by Somjee, A. H.
Published 1995
77
78
by Fraser,Thomas M
Published 1960
79
Published 2006
80
Published 1987