Columbia subject headings:
Gulf Cooperation Council.
International relations.
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government.
Persian Gulf States--Foreign relations.
Petroleum industry and trade--Persian Gulf Region.
Harvard subject headings:
Gulf Cooperation Council
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government.
Princeton subject headings:
Gulf Cooperation Council.
International relations.
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government.
Persian Gulf States--Foreign relations.
Petroleum industry and trade--Persian Gulf Region.