Columbia subject headings:
Harvard subject headings:
Baltic Sea--Strategic aspects--Congresses.
Barents Sea--Strategic aspects--Congresses.
Finland--Defenses--Congresses.
Norwegian Sea--Strategic aspects--Congresses.
Scandinavia--Defenses--Congresses.
Princeton subject headings:
Baltic Sea--Strategic aspects--Congresses.
Barents Sea--Strategic aspects--Congresses.
Finland--Defenses--Congresses.
Norwegian Sea--Strategic aspects--Congresses.
Scandinavia--Defenses--Congresses.