Columbia subject headings:
Africa, Sub-Saharan--Civilization--Congresses.
Islam--Africa, Sub-Saharan--History--20th century--Congresses.
Harvard subject headings:
Africa, Sub-Saharan--Civilization--Congresses.
Islam--Africa, Sub-Saharan--History--20th century--Congresses.
Princeton subject headings:
Africa, Sub-Saharan--Civilization--Congresses.
Islam--Africa, Sub-Saharan--History--20th century--Congresses.