Columbia subject headings:
Company towns--Canada--History--Bibliography.
Company towns--United States--History--Bibliography.
Labor camps--Canada--History--Bibliography.
Labor camps--United States--History--Bibliography.
Working class--Canada--History--Bibliography.
Working class--United States--History--Bibliography.
Harvard subject headings:
Company towns--Canada--History--Bibliography.
Company towns--United States--History--Bibliography.
Labor camps--Canada--History--Bibliography.
Labor camps--United States--History--Bibliography.
Working class--Canada--History--Bibliography.
Working class--United States--History--Bibliography.
Princeton subject headings: