Columbia subject headings:
Wages--France--History.
Wages--Germany--History.
Wages--Great Britain--History.
Wages--Sweden--History.
Wages--United States--History.
Harvard subject headings:
Wages--France--History.
Wages--Germany--History.
Wages--Great Britain--History.
Wages--Sweden--History.
Wages--United States--History.
Princeton subject headings:
Wages--France--History.
Wages--Germany--History.
Wages--Great Britain--History.
Wages--Sweden--History.
Wages--United States--History.