Columbia subject headings:
Harvard subject headings:
Deutsche Bibliothek (Frankfurt am Main, Germany)
Frankfurt am Main (Germany)--Buildings, structures, etc.
Library architecture--Germany--Frankfurt am Main--Designs and plans.
National libraries--Germany--Frankfurt am Main--Designs and plans.
Princeton subject headings:
Architecture--Competitions--Germany (West)--Frankfurt am Main.
Deutsche Bibliothek (Frankfurt am Main, Germany)--Buildings.
Libraries--Designs and plans.
Pflug, Günther.