Working class 42 Education 39 History 12 Adult education 7 Education, Higher 3 Education (Higher) 2 Education and state 2 Industry and education 2 Peasantry 2 Poor 2 Social conditions 2 Agricultural laborers 1 Anarchism 1 Apprentices 1 Audio-visual education 1 Books and reading 1 Case studies 1 Child labor 1 Children 1 Congresses 1 Education (Primary) 1 Education, Humanistic 1 Education, Rural 1 Education, Secondary 1 Education, Urban 1 Employees 1 Employment 1 Evening and continuation schools 1 Factory laws and legislation 1 Foreign income 1