Labor unions History 98 Labor and laboring classes 64 Working class 47 Labor movement 32 Labor 27 Clothing workers 19 more ... Employment 19 Congresses 17 Periodicals 15 Strikes and lockouts 15 African Americans 14 Officials and employees 13 Labor laws and legislation 12 Railroads 12 Afro-American membership 11 Clothing trade 11 Biography 10 Coal miners 10 Employees 10 Societies, etc 10 Socialism 9 Communism 8 Labor leaders 8 Political activity 8 Stevedores 8 Race relations 7 Agricultural laborers 6 Economic conditions 6 Industrial relations 6 Iron and steel workers 6 Merchant mariners 5 Newspapers 5 Syndicats 5 Textile workers 5 Civil rights 4 Discrimination in employment 4 Histoire 4 Jews 4 Labor contract 4 less ...