Columbia subject headings:
Persian Gulf Region--Economic conditions--Bibliography.
Persian Gulf Region--Politics and government--Bibliography.
Persian Gulf Region--Social conditions--Bibliography.
Petroleum industry and trade--Persian Gulf Region--Bibliography.
Harvard subject headings:
Persian Gulf Region--Economic conditions--Bibliography.
Persian Gulf Region--Politics and government--Bibliography.
Persian Gulf Region--Social conditions--Bibliography.
Petroleum industry and trade--Persian Gulf Region--Bibliography.
Princeton subject headings:
Persian Gulf Region--Economic conditions--Bibliography.
Persian Gulf Region--Politics and government--Bibliography.
Persian Gulf Region--Social conditions--Biliography.
Petroleum industry and trade--Persian Gulf Region--Bibliography.