State of the world 1998 a world watch institute report on progress toward a sustainable society

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• State of the world 1998 a world watch institute report on progress toward a sustainable society
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• State of the world 2003: a worldwatch institute report on progress towards a sustainable society
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• State of the world 1998: a world watch institute report on progress toward a sustainable society
  著者:: Brown, Lester R; Author
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• State of the World 1998
  著者:: Brown, Lester R.
  出版事項: (1997)