Columbia subject headings:
Equal pay for equal work--United States--History.
Women--Employment--Law and legislation--United States.
Harvard subject headings:
Equal pay for equal work--United States--History.
Pay equity--United States--History.
Wages--Women--United States--History.
Princeton subject headings:
Equal pay for equal work--United States--History.
Pay equity--United States--History.
Wages--Women--United States--History.