Columbia subject headings:
Architecture--Germany--Schleswig-Holstein--Guidebooks.
Architecture--Germany--Schleswig-Holstein--History--20th century--Guidebooks.
Harvard subject headings:
Architecture, Modern--20th century--Germany--Schleswig-Holstein--Guidebooks.
Architecture--Germany--Schleswig-Holstein--Guidebooks.
Architecture--Germany--Schleswig-Holstein--History--Guidebooks.
Princeton subject headings: