Columbia subject headings:
Harvard subject headings:
Geology--North Sea
Geology--North Sea--Congresses.
Hydrocarbons--North Sea--Congresses.
Hydrocarbons--North Sea.
Princeton subject headings:
Geology--North Sea--Congresses.
Geology--Scotland--Moray Firth Region--Congresses.
Hydrocarbons--North Sea--Congresses.