Columbia subject headings:
Harvard subject headings:
Diversification in industry--Persian Gulf States.
Economic development--Persian Gulf States.
Economics--Middle East.
Knowledge economy--Persian Gulf States.
Middle East--Economic conditions
Persian Gulf States--Economic conditions.
Persian Gulf States--Economic policy.
Princeton subject headings:
Economic development--Persian Gulf States.
Economics--Middle East.
Knowledge economy--Persian Gulf States.
Middle East--Economic conditions.
Persian Gulf States--Economic conditions.