Columbia subject headings:
Harvard subject headings:
Africa, North--History--10th century.
Arabs--Africa, North--Emigration and immigration--History--10th century.
Tribes--Morocco--History--10th century.
Princeton subject headings:
Africa, North--History--10th century.
Arabs--Africa, North--Emigration and immigration--History--10th century.
Tribes--Morocco--History--10th century.