African Americans Social conditions Race relations Employment African American civic leaders--Pennsylvania--Philadelphia African American inventors--Pennsylvania--Philadelphia African American novelists--Pennsylania--Philadelphia African American women journalists--Pennsylvania--Philadelphia African Americans--Civil rights--History African Americans--Employment Afro-Americans Caricatures and cartoons Civil rights Discrimination in employment Employees Ethnic groups Joint Organization of the Association for Equalizing Industrial Opportunities and the League of Civic and Political Reform Korean War, 1950-1953 Officals and employees Postal service Race discrimination Stereotypes United States Postal Service--Officials and employees World politics