Columbia subject headings:
Geology--Norwegian Sea Region--Congresses.
Petroleum in submerged lands--Norwegian Sea Region--Congresses.
Petroleum--Geology--Norwegian Sea Region--Congresses.
Harvard subject headings:
Continental margins--Europe--Congresses.
Geology--Norwegian Sea Region--Congresses.
Natural gas in submerged lands--Europe--Congresses.
Petroleum in submerged lands--Europe--Congresses.
Petroleum in submerged lands--Norwegian Sea Region--Congresses.
Petroleum--Geology--Norwegian Sea Region--Congresses.
Princeton subject headings:
Petroleum in submerged lands--Europe, Northern.
Petroleum in submerged lands--North Atlantic ocean.
Petroleum in submerged lands--North Sea.
Petroleum--Geology--Europe, Northern--Congresses.
Petroleum--Geology--North Atlantic Ocean--Congresses.
Petroleum--Geology--North Sea--Congresses.