1
Published 1993
2
3
Published 1993
4
Published 1993
5
by Carter, Barry E.
Published 1995
6
by Nollkaemper, Andre
Published 1993
7
by Birnie, Patricia W.
Published 1992
8
Published 2001
9
Published 1995
10
by Smith, Brian D.
Published 1988
11
Published 2000
12
by Birnie, Patricia W.
Published 1992
13
Published 1984
14
Published 1983
15
by Okowa, Phoebe Nyawade
Published 2000
16
Published 1992
17
by Susskind, Lawrence E.
Published 1994
18
19
20
by Finus, Michael, 1965-
Published 2001