Columbia subject headings:
Communist Party of the United States of America--History.
Social conflict--United States--History.
Working class--United States--History.
Harvard subject headings:
Communist Party of the United States of America--History.
Hall, Gus
Social conflict--United States--History.
Working class--United States--History
Princeton subject headings:
Communist Party of the United States of America--History.
Labor movement--United States--History.
Social conflict--United States--History.
Working class--United States--History.