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- Picketing--Pennsylvania--Pittsburgh3
- African American civil rights workers--Pennsylvania--Pittsburgh2
- African Americans--Civil rights--Pennsylvania--Pittsburgh2
- Civil rights movements--Pennsylvania--Pittsburgh2
- Civil rights workers--Pennsylvania--Pittsburgh2
- National Association for the Advancement of Colored People2
- Signs and signboards--Pennsylvania--Pittsburgh2
- Central business districts--Pennsylvania--Pittsburgh1
- Civic Arena (Pittsburgh, Pa.)1
- Crowds--Pennsylvania--Pittsburgh1
- Demonstrations--Pennsylvania--Pittsburgh1
- Discrimination in employment--Pennsylvania--Pittsburgh1
- Greater Pittsburgh Improvement League (Pittsburgh, Pa.)1
- Judges--United States1
- Men--Pennsylvania--Pittsburgh1
- Protest marches--Pennsylvania--Pittsburgh1
- Race discrimination--Pennsylvania--Pittsburgh1
- Sidewalks--Pennsylvania--Pittsburgh1
- Trucks--Pennsylvania--Pittsburgh1
- U.S. Steel Building (Pittsburgh, Pa.)1