Coal miners History 21 Coal mines and mining 6 Anthracite coal industry 5 Labor unions 5 Social conditions 5 Irish Americans 4 more ... Irish 3 Labor movement 3 Molly Maguires 3 Coal trade 2 Economic conditions 2 Railroads 2 Bibliography 1 Case studies 1 Catalogs 1 Coal mine accidents 1 Elections 1 Ethnology 1 Iron and steel workers 1 Labor laws and legislation 1 Manuscripts 1 Mine closures 1 Mine rescue work 1 Mining law 1 Political activity 1 Slavs 1 Social life and customs 1 Social perception 1 Socialism 1 Societies, etc 1 Sources 1 Trials (Murder) 1 Trials, litigation, etc 1 less ...