Columbia subject headings:
Africa, Sub-Saharan--Rural conditions--Congresses.
Migration, Internal--Africa, Sub-Saharan--Congresses.
Urbanization--Africa, Sub-Saharan--Congresses.
Harvard subject headings:
Africa, Sub-Saharan--Rural conditions--Congresses.
Migration, Internal--Africa, Sub-Saharan--Congresses.
Urbanization--Africa, Sub-Saharan--Congresses.
Princeton subject headings:
Africa, Sub-Saharan--Rural conditions--Congresses.
Migration, Internal--Africa, Sub-Saharan--Congresses.
Urbanization--Africa, Sub-Saharan--Congresses.