Columbia subject headings:
Harvard subject headings:
Concessions--Persian Gulf States
Great Britain--Foreign economic relations--Persian Gulf States--Sources.
Great Britain. India Office--Archives.
Oil and gas leases--Persian Gulf States
Persian Gulf States--Foreign economic relations--Great Britain--Sources.
Princeton subject headings:
Concessions--Persian Gulf States.
Oil and gas leases--Persian Gulf States.
Petroleum law and legislation--Persian Gulf Region.