Columbia subject headings:
Iron and steel workers--Labor unions--United States--History--Congresses.
Murray, Philip, 1886-1952--Congresses.
Steel Workers Organizing Committee (U.S.)--History--Congresses.
United Steelworkers of America--History--Congresses.
Harvard subject headings:
Iron and steel workers--Labor unions--United States--History--Congresses.
Iron and steel workers--Labor unions--United States.
Murray, Philip, 1886-1952--Congresses.
Murray, Philip, 1886-1952.
Steel Workers Organizing Committee (U.S.)--History--Congresses.
United Steelworkers of America--History--Congresses.
United Steelworkers of America--History.
Princeton subject headings:
Iron and steel workers--Labor unions--United States--History--Congresses.
Murray, Philip, 1886-1952--Congresses.
Steel Workers Organizing Committee (U.S.)--History--Congresses.
United Steelworkers of America--History--Congresses.