Columbia subject headings:
Architecture--Germany--Mannheim.
Mannheim (Germany)--Description and travel.
Mannheim (Germany)--History.
Harvard subject headings:
Architecture--Germany--Mannheim.
Mannheim (Germany)--Description and travel.
Mannheim (Germany)--History.
Princeton subject headings:
Architecture--Germany (West)--Mannheim.
Mannheim (Germany)--Description.
Mannheim (Germany)--History.