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Environmental guidelines for agricultural mechanization / prep. by UNEP in consultation with UN specialized agencies ; ed. by Henry E. Russell and associates.
- United Nations Environment Programme,
- 1986.
- Nairobi :
-
The natural resources of East Africa / ed. by E.W. Russell.
- 864.5-7
- Hawkins [etc.],
- 1962.
- Nairobi :
-
The climate of East Africa / J.F. Griffiths.
- Hawkins [etc.],
- 1962.
- Nairobi :