Columbia subject headings:
Harvard subject headings:
Baltic Sea Region--Relations--Germany.
Estonians--Finland, Gulf of--History--Congresses.
Ethnology--Finland, Gulf of--History--Congresses.
Finland, Gulf of--Civilization--Congresses.
Finland, Gulf of--History--Congresses.
Germans--Estonia--Social conditions.
Germans--Finland, Gulf of--History--Congresses.
Germans--Finland--Social conditions.
Germany--Relations--Baltic Sea Region.
Hanseatic League
Princeton subject headings:
Baltic Sea Region--Relations--Germany.
Germans--Estonia--Social conditions.
Germans--Finland--Social conditions.
Germany--Relations--Baltic Sea Region.
Hanseatic League--Baltic Sea Region.