Columbia subject headings:
Africa, West--Emigration and immigration.
Hausa (African people)--Sudan--Social conditions.
Muslim pilgrims and pilgrimages--Africa, West.
Muslim pilgrims and pilgrimages--Saudi Arabia--Mecca.
Muslim pilgrims and pilgrimages--Sudan.
Sudan--Emigration and immigration.
Harvard subject headings:
Hausa (African people)--Sudan.
Muslim pilgrims and pilgrimages--Sudan.
Sudan--Religious life and customs.
Princeton subject headings: