National report : United Nations Conference on Environment and Development, Brail, 1992 - The Gambia
1992
Environmental surveys
Land use policy and draft legislation in Ethiopia
1989
Singer, Norman J. |
The environmental impact of agriculture in Ethiopia
1978
Kuru, Assefa |
Cartography and its application for Geographical and Ecological problems : Siemen Mountains - Ethiopia
1978
Messerli, Bruno |
Aerni, K. |