21
22
by Head, Ivan L.
Published 1991
23
by Pool, John Charles
Published 1991
24
25
26
by Garnaut, Ross
Published 1994
27
Published 1990
28
by Sethi, J.D, 1924-
Published 1990
29
Published 1992
30
31
by Weekly, James K.
Published 1987
32
by Meier, Gerald M.
Published 1968
33
by Isaak, Robert A.
Published 1991
34
by Corden, W. M. (Warnex Max)
Published 1992
35
by Khor, Martin
Published 2000
36
by Obminsky, Ernest
Published 1988
37
by Williams, Marc
Published 1994
38
by Hodgson, John S.
Published 1983
39
by Lubbers, R.F.M.
Published 1991
40
by Salvatore, Dominick
Published 1983