Columbia subject headings:
Harvard subject headings:
Class consciousness--United States--History--20th century.
Labor disputes--United States--Case studies.
Labor unions--United States--History--20th century
Working class--United States--History--20th century
Princeton subject headings:
Class consciousness--United States--History--20th century.
Labor disputes--United States--Case studies.
Labor unions--United States--History--20th century.
Working class--United States--History--20th century.