Columbia subject headings:
Harvard subject headings:
Canals--Political aspects--Germany--History.
Kiel Canal (Germany)--History.
Kiel Canal (Germany)--Pictorial works.
Shipping--Germany--Kiel Canal--History.
Symbolism in politics--Germany--History.
Princeton subject headings:
Canals--Political aspects--Germany--History.
Kiel Canal (Germany)--History.
Kiel Canal (Germany)--Pictorial works.
Shipping--Germany--Kiel Canal--History.
Symbolism in politics--Germany--History.