Strikes and lockouts History 177 Labor unions 78 Industrial relations 35 Working class 34 Coal mining 30 Labor movement 30 más ... Teachers 24 Coal miners 21 Collective bargaining 20 Social conditions 19 Miners 18 Politics and government 18 Labor disputes 16 Law and legislation 13 Social aspects 13 Coal mines and mining 12 Employees 12 Political activity 12 Economic conditions 11 Textile industry 11 Automobile industry 9 Clothing trade 9 Labor laws and legislation 8 Railroads 8 Textile workers 7 Women 7 Automobile industry workers 6 Civil service 6 Labor 6 menos ...