Columbia subject headings:
Agriculture--Economic aspects--Africa, Sub-Saharan--Congresses.
Biotic communities--Africa, Sub-Saharan--Congresses.
Economic development--Environmental aspects--Africa, Sub-Saharan.
Pastoral systems--Africa, Sub-Saharan--Congresses.
Harvard subject headings:
Agriculture--Economic aspects--Africa, Sub-Saharan--Congresses.
Biotic communities--Africa, Sub-Saharan--Congresses.
Economic development--Environmental aspects--Africa, Sub-Saharan.
Pastoral systems--Africa, Sub-Saharan--Congresses.
Princeton subject headings:
Africa, Sub-Saharan--Economic policy.
Desertification--Africa Sub-Saharan.
Environmental policy--Africa, Sub-Saharan.
Human ecology--Africa, Sub-Saharan.
Rural development--Africa, Sub-Saharan.