Columbia subject headings:
Architecture--Germany--Bremen--History--20th century--Exhibitions.
Architecture--Germany--Bremen--History--21st century--Exhibitions.
Bremen (Germany)--Buildings, structures, etc.--Exhibitions.
Ungers, O. M. (Oswald Mathias)--Exhibitions.
Harvard subject headings:
Architects--Germany
Architecture--Germany--Bremen--20th century.
Architecture--Germany--Bremen--History--Exhibitions.
Bremen (Germany)--Buildings, structures, etc.
Office buildings--Germany--Bremen.
Ungers, O. M. (Oswald Mathias)
Ungers, O. M. (Oswald Mathias)--Exhibitions.
Princeton subject headings: