Desertification and development : dryland ecology in social perspective
1982
Spooner, Brian |
Mann, H. S. |
Desertification
Desertification : environmental degradation in and around Arid lands
1977
Glantz, Michael H. |
Problems of land degradation in Commonwealth Africa : a study of the scope of Commonwealth action
1989
Milner, C. |
Douglas, M. G. |