Columbia subject headings:
Unna (Germany : Landkreis)--History.
World War, 1939-1945--Influence.
Harvard subject headings:
Unna (Germany : Landkreis)--History.
World War, 1939-1945--Influence.
Princeton subject headings:
Unna (Germany : Landkreis)--History.
World War, 1939-1945--Influence.