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United Nations Environment Programme ,  [The State of the Environment 1984: The Environment in the Dialogue between and among Developed and Developing Countries] ,  The State of the Environment 1984: The Environment in the Dialogue between and among Developed and Developing Countries

United Nations Environment Programme ,  [Environmental Aspects of the Iron and Steel Industry Workshop Proceedings Part 2 - Geneva, 17-20 October, 1978] ,  Environmental Aspects of the Iron and Steel Industry Workshop Proceedings Part 2 - Geneva, 17-20 October, 1978