Columbia subject headings:
Architecture--Germany--Exhibitions.
City planning--Germany--Exhibitions.
International Architectural Exhibition (6th : 1996 : Venice, Italy)
Harvard subject headings:
Architecture--Ems River Valley (Germany and Netherlands)--Technological innovations.
Architecture--Europe--Technological innovations.
City planning--Ems River Valley (Germany and Netherlands)--Forecasting.
City planning--Europe--Forecasting.
Princeton subject headings: