Columbia subject headings:
European Economic Community countries--Commerce--Middle East.
Middle East--Commerce--European Economic Community countries.
Petroleum industry and trade--Persian Gulf Region.
Harvard subject headings:
European Economic Community countries--Commerce--Middle East.
Middle East--Commerce--European Economic Community countries.
Petroleum industry and trade--Persian Gulf Region
Princeton subject headings:
European Economic Community countries--Commerce--Middle East.
Middle East--Commerce--European Economic Community countries.
Petroleum industry and trade--Persian Gulf Region.