Columbia subject headings:
Nomads--Sahara--History.
Sahara--Foreign relations.
Sahara--History.
Sahara--Politics and government.
Harvard subject headings:
Nomads--Sahara--History.
Sahara--Foreign relations.
Sahara--History.
Sahara--Politics and government.
Princeton subject headings:
Nomads--Sahara--History.
Sahara--Description and travel.
Sahara--History.
Sahara--Politics and government.
Sahara--Social conditions.