Columbia subject headings:
Labor unions--United States--History--20th century.
New Deal, 1933-1939.
United States--Economic policy--1933-1945.
Harvard subject headings:
Labor unions--United States--History
New Deal, 1933-1939.
Working class--United States
Princeton subject headings:
Labor movement--United States--History--20th century.
Labor unions--United States--History--20th century.