Columbia subject headings:
Harvard subject headings:
Baltic States--History--Congresses.
Baltic States--Social conditions--Congresses.
Cities and towns--Baltic States--History--Congresses.
Community development, Urban--Baltic States--Congresses.
Conference papers and proceedings.
Princeton subject headings:
Baltic States--History--Congresses.
Baltic States--Social conditions--Congresses.
Cities and towns--Baltic States--History--Congresses.
Community development, Urban--Baltic States--Congresses.