1
Published 1991
2
by Commoner, Barry, 1917-
Published 1990
3
by Young, John
Published 1991
4
Published 1987
5
Published 1995
6
by McNeely, Jeffrey A.
Published 1988
7
Published 1994
8
Published 1992
9
Published 1996
10
by Holdgate, Martin
Published 1996
11
by Denton, Peter
Published 1995
12
by Szasz, Andrew, 1947-
Published 1994
13
Published 1992
14
Published 1992
15
Published 1995
16
by Reid, David
Published 1995
17
Published 1997
18
by McKibben, Bill
Published 1989