Columbia subject headings:
Household employees--Labor unions--United States--History.
Social classes--United States--History.
Women household employees--United States--History.
Harvard subject headings:
Household employees--Labor unions--United States--History.
Social classes--United States--History
Women household employees--United States--History.
Princeton subject headings:
Household employees--Labor unions--United States--History.
Social classes--United States--History.
Women household employees--United States--History.