Columbia subject headings:
Refugees--Africa, Northeast.
Refugees--Africa, Northwest.
Refugees--Chad.
Refugees--Ethiopia.
Harvard subject headings:
Refugees--Africa, Northeast.
Refugees--Africa, Northwest.
Refugees--Chad.
Refugees--Ethiopia.
Princeton subject headings:
Chad--Emigration and immigration.
Chad--History--1960-1990.
Ethiopia--Economic conditions--1974-
Ethiopia--Emigration and immigration.
Ethiopia--History--1974-.