Columbia subject headings:
Continental shelf--Europe--Congresses.
Offshore oil well drilling--Environmental aspects--Congresses.
Petroleum in submerged lands--Europe--Congresses.
Harvard subject headings:
Continental shelf--Europe--Congresses.
Offshore oil well drilling--Environmental aspects--Congresses.
Petroleum in submerged lands--Europe--Congresses.
Princeton subject headings:
Continental shelf--Europe--Congresses.
Offshore oil well drilling--Environmental aspects--Congresses.
Petroleum in submerged lands--Europe--Congresses.