1.

図書
図書
1. Plan B 3.0 : mobilizing to save civilization
Lester R. Brown
出版情報: New York ; London : W.W. Norton, c2008
2.

図書
図書
2. Plan B 2.0 : rescuing a planet under stress and a civilization in trouble. 1st ed
Lester R. Brown
出版情報: New York ; London : W.W. Norton, c2006
3.

図書
図書
3. Agenda 21 : the Earth Summit strategy to save our planet
introduction by Paul Simon ; edited by Daniel Sitarz
出版情報: Boulder, Colo. : EarthPress, c1993