Columbia subject headings:
Ethiopia--Boundaries--Somalia.
Ethiopia--Colonization.
Ethiopia--History--1889-1974.
Ogaden (Ethiopia)--Politics and government.
Somalia--Boundaries--Ethiopia.
Harvard subject headings:
Ethiopia--Boundaries--Somalia.
Ethiopia--Colonization.
Ethiopia--History--1889-1974.
Ogaden (Ethiopia)--Politics and government.
Somalia--Boundaries--Ethiopia.
Princeton subject headings:
Ethiopia--Boundaries--Somalia.
Ethiopia--Colonization.
Ethiopia--History--1889-1974.
Ogaden (Ethiopia)--Politics and government.
Somalia--Boundaries--Ethiopia.