Columbia subject headings:
Persian Gulf States--Economic conditions--21st century.
Persian Gulf States--Economic policy--21st century.
Persian Gulf States--Foreign relations.
Harvard subject headings:
Persian Gulf States--Economic conditions--21st century.
Persian Gulf States--Economic policy--21st century.
Persian Gulf States--Foreign relations.
Princeton subject headings:
Persian Gulf States--Economic conditions--21st century.
Persian Gulf States--Economic policy--21st century.
Persian Gulf States--Foreign relations.