1
by Handscombe, Richard S.
Published 1989
2
by Hampen-Turner, Charles
Published 1990
3
by Hay, Michael
Published 1991
4
5
6
Published 1990
7
8
by Certo, Samuel C.
Published 1990
9
10
by Lambert, Thomas
Published 1996
11
12
by Merli, Giorgio
Published 1996
13
by Austin, James E.
Published 1990
14
15
16
17
by Porter, Michael E.
Published 1990
18
19
20
by Noorderhaven, Niels G.
Published 1995