Columbia subject headings:
Industries--Pennsylvania--Pittsburgh.
Pittsburgh (Pa.)--Social conditions.
Popular culture--Pennsylvania--Pittsburgh.
Working class--Pennsylvania--Pittsburgh.
Harvard subject headings:
Industries--Pennsylvania--Pittsburgh
Pittsburgh (Pa.)--Social conditions.
Popular culture--Pennsylvania--Pittsburgh.
Working class--Pennsylvania--Pittsburgh.
Princeton subject headings:
Industries--Pennsylvania--Pittsburgh.
Pittsburgh (Pa.)--Social conditions.
Popular culture--Pennsylvania--Pittsburgh.
Working class--Pennsylvania--Pittsburgh.