81
Published 1990
82
by O'Leary, De Lacy
Published 2001
83
by Higham, Charles
Published 2002
84
Published 1995
85
86
by Hyung-Sup, Choi
Published 1990
87
Published 1994
88
by Pimm, Stuart L
Published 1991
89
by Hawking, Stephen W.
Published 1988
90
Published 1993
91
by Hancox, David
Published 1999
92
Published 1991
93
Published 1991
94
Published 2006
95
Published 1990
96
97
by Fernandez, Josie M.
Published 2006
98
by Trefil, James S, 1938-
Published 1988
99
Published 1998
100
by McNab, Chris
Published 2006