Columbia subject headings:
North Rhine-Westphalia (Germany)--History.
World War, 1939-1945--Influence.
Harvard subject headings:
North Rhine-Westphalia (Germany)--History.
World War, 1939-1945--Influence.
Princeton subject headings:
North Rhine-Westphalia (Germany)--Economic conditions.
North Rhine-Westphalia (Germany)--History.
North Rhine-Westphalia (Germany)--Social conditions.