1
2
Published 1994
3
by Bartelmus, Peter
Published 1994
4
by Lomborg, Bjorn
Published 2007
5
Published 2005
6
Published 2004
7
8
by Brennan, Teresa, 1952-
Published 2003
9
Published 1991
10
Published 1977
11
Published 1980
12
Published 1989
13
by Korber, Achim
Published 2000
14
by Carley, Michael
Published 1984
15
Published 1996
16
Published 1993
17
by Prugh, Thomas
Published 2000
18
by Falloux, Fran???c̜ois
Published 1993
19
by Maduro, Rogelio A.
Published 1992
20
Published 1980