Columbia subject headings:
Letting of contracts--North Sea Region.
Offshore oil industry--Law and legislation--North Sea Region.
Oil and gas leases--North Sea Region.
Harvard subject headings:
Letting of contracts--North Sea Region.
Offshore oil industry--Law and legislation--North Sea Region.
Oil and gas leases--North Sea Region.
Princeton subject headings:
Letting of contracts--North Sea Region.
Offshore oil industry--Law and legislation--North Sea Region.
Oil and gas leases--North Sea Region.