Columbia subject headings:
Congress of Industrial Organizations (U.S.)--History--Sources--Catalogs.
Labor unions--Southern States--History--Sources--Catalogs.
Harvard subject headings:
Congress of Industrial Organizations (U.S.)--History--Sources--Catalogs.
Labor unions--Southern States--History--Sources--Catalogs.
Princeton subject headings:
Congress of Industrial Organizations (U.S.)--History--Sources--Catalogs.
Labor unions--Southern States--History--Sources--Catalogs.