Columbia subject headings:
Aachen (Germany)--Description and travel.
Bergisches Land (Germany)--Description and travel.
Cologne Metropolitan Area (Germany)
Monheim (North Rhine-Westphalia, Germany)
Harvard subject headings:
Princeton subject headings:
Aachen (Germany)--Description and travel.
Bergisches Land (Germany)--Description and travel.
Cologne Metropolitan Area (Germany)
Monheim (North Rhine-Westphalia, Germany)