61
by Snow, Donald M, 1943-
Published 2000
62
by Ramsbotham, Oliver
Published 1991
63
by Nordlinger, Eric A.
Published 1986
64
by Peterson, John, 1947-
Published 1978
65
by Becker, Bertha K.
Published 1992
66
by Loen, Raymond O.
Published 1994
67
by McGlen, Nancy E, 1947-
Published 1993
68
by Blondel, Jean, 1929-
Published 1981
69
Published 1996
70
by Kennedy, Joseph, 1919-
Published 1989
71
by Pathmanathan, Murugesu
Published 1990
72
by Jones, Rodney W.
Published 1984
73
by Hughes, Barry, 1945-
Published 1994
74
75
by Kenworthy, Eldon, 1935-
Published 1995
76
by Kwan, C. H, 1957-
Published 1994
77
by Ellings, Richard J.
Published 1996
78
by Lal, Deepak
Published 1989
79
Published 1996
80
by Ananta, Aris.
Published 2005