Columbia subject headings:
Harvard subject headings:
Carpenters--Labor unions--Illinois--Chicago--History.
Chicago (Ill.)--Social conditions.
United Brotherhood of Carpenters and Joiners of America--History.
Work environment--Illinois--Chicago--History.
Princeton subject headings:
Carpenters--Labor unions--Illinois--Chicago--History.
Chicago (Ill.)--Social conditions.
United Brotherhood of Carpenters and Joiners of America--History.
Work environment--Illinois--Chicago--History.