1
by Barbier
Published 2005
2
by McWilliams
Published 1993
3
by Duncan
Published 1990
4
Published 1989
5
Published 1992
6
by Porter
Published 1984
7
by Clapham
Published 1990
8
Published 1992
9
by Raghavan
Published 1990
10
11
12
by Hadjor
Published 1993
13
Published 1992
14
by Harris, 1935-
Published 1991
15
16
Published 1988
17
Published 1992
18
19
Published 1990
20
by Simonia
Published 1992