Columbia subject headings:
Droughts--Sahel.
Economic assistance--Sahel.
Famines--Sahel.
Sahel--Economic policy.
Harvard subject headings:
Droughts--Sahel
Economic assistance--Sahel.
Famines--Sahel
Sahel--Economic policy.
Princeton subject headings:
Droughts--Sahel.
Economic assistance--Sahel.
Famines--Sahel.
Sahel--Economic policy.