61
Published 1990
62
by Lanzer, Harriette
Published 1995
63
by Sen, Krishna
Published 1994
64
by Taylor, Paul
Published 1993
65
by Duser, J. Thorsten
Published 1990
66
by Hague, Paul
Published 1993
67
Published 1994
68
Published 1993
69
70
by Hoffmeyer, Erik
Published 1992
71
by Melman, Yossi
Published 1989
72
by Suvorov, Viktor
Published 1990
73
74
by Levine, Janet
Published 1988
75
by Baral, Jagadish R.
Published 1989
76
by Thana, M.
Published 1989
77
Published 1989
78
Published 1989
79
Published 1989
80
by Khor, Kok Peng
Published 1998