Columbia subject headings:
Foreign workers--Michigan--Detroit--History.
Industries--Michigan--Detroit--History.
Social classes--Michigan--Detroit--History.
Working class--Michigan--Detroit--History.
Harvard subject headings:
Class consciousness--Michigan--Detroit--History--19th century.
Detroit (Mich.)--Economic conditions.
Foreign workers--Michigan--Detroit--History--19th century.
Foreign workers--Michigan--Detroit--History.
Industries--Michigan--Detroit--History.
Social classes--Michigan--Detroit--History.
Working class--Michigan--Detroit--History--19th century.
Working class--Michigan--Detroit--History.
Princeton subject headings:
Foreign workers--Michigan--Detroit--History.
Industries--Michigan--Detroit--History.
Social classes--Michigan--Detroit--History.
Working class--Michigan--Detroit--History.