Columbia subject headings:
Architecture--Germany (West)
Architecture--Germany (West)--History--20th century.
Functionalism (Architecture)--Germany (West)
Skyscrapers--Germany (West)
Skyscrapers.
Harvard subject headings:
Architecture, Modern--20th century--Germany.
Architecture--Germany--History--20th century
Skyscrapers--Germany--History.
Tall buildings--Germany--History.
Princeton subject headings:
Architecture, Modern--20th century--Germany.
Skyscrapers--Germany--History.
Tall buildings--Germany--History.