Columbia subject headings:
Architecture--Awards--Germany--Exhibitions.
Architecture--Designs and plans--Exhibitions.
Internationaler Hochhaus Preis--Exhibitions.
Skyscrapers--Exhibitions.
Tall buildings--Exhibitions.
Harvard subject headings:
Architecture, Modern--Competitions.
Skyscrapers--Designs and plans--Competitions.
Tall buildings--Designs and plans--Competitions.
Princeton subject headings:
Architecture--Awards--Germany--Exhibitions.
Architecture--Designs and plans--Exhibitions.
Internationaler Hochhaus Preis--Exhibitions.
Skyscrapers--Exhibitions.
Tall buildings--Exhibitions.