Labor unions History 130 Labor and laboring classes 78 Working class 50 Labor movement 41 Labor 32 Employment 29 more ... Clothing workers 25 African Americans 22 Coal miners 21 Strikes and lockouts 20 Periodicals 19 Congresses 18 Railroads 18 Officials and employees 17 Afro-American membership 14 Biography 14 Employees 14 Clothing trade 13 Societies, etc 13 Labor laws and legislation 12 Social conditions 12 Socialism 12 Agricultural laborers 11 Stevedores 11 Communism 9 Labor leaders 9 Race relations 9 Economic conditions 8 Industrial relations 8 Iron and steel workers 7 Syndicats 7 Textile workers 7 Wages 7 Coal mines and mining 6 Newspapers 6 Political activity 6 Civil rights 5 Discrimination in employment 5 Jews 5 less ...