Columbia subject headings:
Arid regions agriculture.
Desertification--Control.
Desertification.
United Nations Conference on Desertification (1977 : Nairobi, Kenya)
Harvard subject headings:
Arid regions agriculture.
Desertification--Control
Desertification.
United Nations Conference on Desertification (1977 : Nairobi, Kenya)
Princeton subject headings:
Arid regions agriculture.
Desertification--Control.
Desertification.
United Nations Conference on Desertification (1977 : Nairobi, Kenya)