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- Discrimination in employment--Pennsylvania--Pittsburgh[remove]31
- Picketing--Pennsylvania--Pittsburgh[remove]31
- Civil rights movements--Pennsylvania--Pittsburgh28
- Civil rights workers--Pennsylvania--Pittsburgh27
- African Americans--Civil rights--Pennsylvania--Pittsburgh26
- African American civil rights workers--Pennsylvania--Pittsburgh25
- Signs and signboards--Pennsylvania--Pittsburgh23
- Men--Pennsylvania--Pittsburgh19
- Women--Pennsylvania--Pittsburgh18
- Central business districts--Pennsylvania--Pittsburgh10
- Civil rights demonstrations--Pennsylvania--Pittsburgh10
- Sidewalks--Pennsylvania--Pittsburgh9
- Race discrimination--Pennsylvania--Pittsburgh7
- Boycotts--Pennsylvania--Pittsburgh6
- Demonstrations--Pennsylvania--Pittsburgh6
- National Association for the Advancement of Colored People6
- Discrimination--Pennsylvania--Pittsburgh5
- Grant Street (Pittsburgh, Pa.)5
- United States Steel Corporation--Employees5
- Protest marches--Pennsylvania--Pittsburgh4