History 5,834 Politics and government 1,860 History and criticism 1,114 Social conditions 912 Social aspects 579 Foreign relations 573 English literature 547 Economic conditions 498 Law and legislation 444 Education 410 Social life and customs 407 Women 404 Colonies 370 Government policy 321 World War, 1939-1945 304 Economic aspects 283 Social policy 277 Economic policy 269 Management 267 English fiction 260 Study and teaching 253 Civilization 252 Public opinion 252 Employment 250 Construction industry 235 Political aspects 226 Construction contracts 215 Women and literature 209 Study and teaching (Secondary) 205 Emigration and immigration 199