21
by LaRouche
Published 1983
22
by So
Published 1990
23
24
by Hunt
Published 1989
25
by Larrain
Published 1989
26
by Wilber
Published 1992
27
by Smith
Published 1984
28
by Smith
Published 1994
29
by Mishan
Published 1993
30
Published 1992
31
by Toye
Published 1993
32
by Naqvi
Published 1993
33
by Hanink
Published 1994
34
Published 1994
35
by Evans
Published 1989
36
Published 1992
37
by Ohmae
Published 1990
38
Published 1993
39
Published 2001
40
Published 2001