Columbia subject headings:
Harvard subject headings:
Eritrea--History.
Eritrea--Politics and government--1890-1941.
Italy--Colonies--Boundaries.
Italy--Foreign relations--Turkey.
Red Sea Coast (Ethiopia)--Strategic aspects.
Red Sea Coast (Yemen)--Strategic aspects.
Red Sea--Strategic aspects.
Turkey--Foreign relations--Italy.
Yemen (Republic)--History.
Yemen (Republic)--Politics and government.
Princeton subject headings:
Eritrea--History.
Eritrea--Politics and government--1890-1941.
Italy--Colonies--Boundaries.
Italy--Foreign relations--Turkey.
Red Sea Coast (Ethiopia)--Strategic aspects.
Red Sea Coast (Yemen)--Strategic aspects.
Red Sea--Strategic aspects.
Turkey--Foreign relations--Italy.
Yemen (Republic)--History.
Yemen (Republic)--Politics and government.