Columbia subject headings:
Acquisition of African publications.
Economic assistance--Sahel.
Sahel--Bibliography--Congresses.
Technical assistance--Sahel.
Harvard subject headings:
Information networks--Sahel--Congresses.
Library information networks--Sahel--Congresses.
Sahel--Bibliography.
Sahel--Economic conditions--Bibliography.
Sahel--Social conditions--Bibliography.
Princeton subject headings: