Columbia subject headings:
Constitutional history--Yemen (Republic)
Yemen (Republic)--Economic conditions.
Yemen (Republic)--Politics and government.
Yemen (Republic)--Social conditions.
Harvard subject headings:
Constitutional history--Yemen (Republic)
Yemen (Republic)--Economic conditions.
Yemen (Republic)--Politics and government.
Yemen (Republic)--Social conditions.
Princeton subject headings:
Yemen (People's Democratic Republic)--Politics and government.