Columbia subject headings:
Clerks--Germany--History.
Social classes--Germany--History.
White collar workers--Germany--History.
White collar workers--Political activity--Germany--History.
Harvard subject headings:
Clerks--Germany--History.
Social classes--Germany--History
White collar workers--Germany--History.
White collar workers--Germany--Political activity--History.
White collar workers--Political activity--Germany--History.
Princeton subject headings:
Clerks--Germany--History.
Social classes--Germany--History.
White collar workers--Germany--History.
White collar workers--Germany--Political activity--History.