21
by Oliver, Robert W.
Published 1996
22
Published 1992
23
by Mohamed Ariff, 1940-
Published 1991
24
by Burstein, Daniel
Published 1991
25
by Cammack, Paul
Published 1988
26
Published 1992
27
Published 2002
28
by Khor Kok Peng, Martin
Published 1992
29
Published 1991
30
Published 1993
31
Published 1993
32
by Zhen, Quan Wang
Published 1995
33
by Luttwak, Edward N.
Published 1993
34
by Krueger, Anne O.
Published 1995
35
Published 1989
36
37
Published 1983
38
by Bartu, Friedemann
Published 1992
39
by Beresford, Melanie
Published 2000
40
Published 1995