Columbia subject headings:
Energy policy--North Sea Region.
Environmental policy--North Sea Region.
Natural resources--North Sea Region--Management.
Natural resources--North Sea Region.
Petroleum industry and trade--North Sea Region.
Harvard subject headings:
Energy policy--North Sea Region.
Environmental policy--North Sea Region.
Natural resources--North Sea Region.
Petroleum industry and trade--North Sea Region.
Princeton subject headings:
Energy policy--North Sea Region.
Environmental policy--North Sea Region.
Natural resources--North Sea Region--Management.
Petroleum industry and trade--North Sea Region.