Columbia subject headings:
Hamburg (Germany)--Commerce--History--20th century.
Hamburg (Germany)--Economic conditions.
Inflation (Finance)--Germany--Hamburg--History--20th century.
Middle class--Germany--Hamburg--History--20th century.
Small business--Germany--Hamburg--History--20th century.
Harvard subject headings:
Hamburg (Germany)--Commerce--History--20th century.
Hamburg (Germany)--Economic conditions.
Inflation (Finance)--Germany--Hamburg--History--20th century.
Middle class--Germany--Hamburg--History--20th century.
Small business--Germany--Hamburg--History--20th century.
Princeton subject headings:
Hamburg (Germany)--Commerce--History--20th century.
Hamburg (Germany)--Economic conditions.
Inflation (Finance)--Germany--Hamburg--History--20th century.
Middle class--Germany--Hamburg--History--20th century.
Small business--Germany--Hamburg--History--20th century.