Columbia subject headings:
Harvard subject headings:
Baltic States--History--Exhibitions.
Infrastructure (Economics)--Baltic States--Exhibitions.
Regional planning--Baltic States--Exhibitions.
Space (Architecture)--Baltic States--Exhibitions.
Princeton subject headings:
Baltic States--History--Exhibitions.
Infrastructure (Economics)--Baltic States--Exhibitions.
Regional planning--Baltic States--Exhibitions.
Space (Architecture)--Baltic States--Exhibitions.