State of the world 1993: A world watch institute report on progress toward a sustainable society

Eitemau Tebyg

• State of the world 1987: A world watch institute report on progress toward a sustainable society
  gan: Brown, Lester R, et al
  Cyhoeddwyd: (1987)
• State of the world 1993: a world watch institute report on progress toward a sustainable society
  gan: Brown, Lester R; Author
  Cyhoeddwyd: (1993)
• State of the world: A world watch institute report on progress towards a sustainable society
  gan: Brown, Lester R.
• State of the world 1994: a world watch institute report on progress toward a sustainable society
  gan: Brown, Lester R; Author
  Cyhoeddwyd: (1994)
• State of the world 1985: a world watch institute report on progress toward a sustainable society
  gan: Brown, Lester R; Author
  Cyhoeddwyd: (1985)