Columbia subject headings:
Labor unions and mass media--United States--Case studies.
Labor unions--Political activity--United States--Case studies.
Labor unions--United States--Case studies.
Harvard subject headings:
Labor unions and mass media--United States--Case studies.
Labor unions--Political activity--United States--Case studies.
Labor unions--United States--Case studies.
Labor unions--United States--Political activity--Case studies.
Princeton subject headings:
Labor unions and mass media--United States--Case studies.
Labor unions--United States--Case studies.
Labor unions--United States--Political activity--Case studies.