Columbia subject headings:
International Longshoremen's and Warehousemen's Union--History.
Labor unions and communism--United States--History--20th century.
Labor unions and international relations--United States--History--20th century.
Labor unions--Political activity--United States--History--20th century.
Harvard subject headings:
International Longshoremen's and Warehousemen's Union--History.
Labor unions and communism--United States--History--20th century.
Labor unions and international relations--United States--History--20th century.
Labor unions--United States--Political activity--History--20th century.
Princeton subject headings:
International Longshoremen ́s and Warehousemen ́s Union--History.
Labor unions and communism--United States--History--20th century.
Labor unions and international relations--United States--History--20th century.
Labor unions--United States--Political activity--History--20th century.