Columbia subject headings:
Harvard subject headings:
Scandinavia--Relations--Slavic countries--Congresses.
Scandinavia--Relations--Slavic countries--History--Congresses.
Slavic countries--Relations--Scandinavia--Congresses.
Slavic countries--Relations--Scandinavia--History--Congresses.
Princeton subject headings:
Scandinavia--Relations--Slavic countries--History--Congresses.
Slavic countries--Relations--Scandinavia--History--Congresses.