Columbia subject headings:
Wuppertal (Germany)--History--Pictorial works.
Wuppertal (Germany)--History.
Harvard subject headings:
Wuppertal (Germany)--History--Pictorial works.
Wuppertal (Germany)--Pictorial works.
Princeton subject headings:
Wuppertal (Germany)--History--Pictorial works.
Wuppertal (Germany)--History.