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Evaluating the environment : application of cost-benefit analysis to environmental protection measures / ed. by Yusuf J. Ahmad.
- United Nations Environment Programme,
- 1981.
- Nairobi :
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The ecology and utilization of African inland waters / ed. by J.J. Symoens, Mary Burgis, John J. Gaudet.
- United Nations Environment Programme,
- 1981.
- Nairobi :
-
The economics of survival : the role of cost-benefit analysis in environmental decision-making / ed. by Yusuf J. Ahmad.
- United Nations Environment Programme,
- 1981.
- Nairobi :