Ultimate security : the environmental basis of political stability
1996
Myers, Norman |
Ethiopia
Grassroots environmental action : people's participation in sustainable development
1992
Ghai, Dharam |
Vivian, Jessica M. |
African mountains and highlands : problems and perspectives
1990
Messerli, Bruno |
Hurni, Hans |
A report on the National Geographic Society/World Wildlife Fund expedition to study the Mountain Nyala, Tragelaphus Buxtoni
Brown, Leslie |
Etudes sahéliennes 1986
1986
Boudet, G. |
Gallais, J. |
Henry, J. P. |
Krings, T. |
Laurent, G. |
Agroforestry in Africa : a survey of project experience
1990
Kerkhof, Paul |