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Environment and development in Africa : a study / prep. by the Environmental development action (ENDA).
- 860.1
- Pergamon : publ. for UNEP,
- 1981.
- Oxford [etc.] :
-
The ozone layer : proceedings of the meeting of experts designated by governments, intergovernmental and nongovernmental organizations on the ozone layer organized by the United Nations environment programme in Washington DC, 1-9 March 1977 / ed. Asit K. Biswas.
- Pergamon : publ. for UNEP,
- 1979.
- Oxford [etc.] :