81
by Garang, John, 1945-
Published 1992
82
Published 1994
83
Published 1993
84
by Kriger, Norma J.
Published 1992
85
86
by Deng, Francis M, 1938-
Published 1995
87
by Tatad, Francisco S.
Published 1986
88
Published 1997
89
by Layard, P. Richard G.
Published 1996
90
Published 1993
91
Published 1982
92
by Will, George F.
Published 2002
93
by Siegler, Heinrich
Published 1969
94
Published 2004
95
Published 1994
96
Published 1990
97
98
by Fetter, Bruce
Published 1983
99
by Layton-Henry, Zig
Published 1992
100
by Suryadinata, Leo
Published 1996