History 255.602 Politics and government 66.344 History and criticism 57.945 Social aspects 34.013 Social conditions 30.810 Philosophy 28.279 Criticism and interpretation 25.534 espandi ... Jazz 23.849 Foreign relations 19.747 Economic conditions 19.610 Women 19.395 Social life and customs 18.895 Piano music 18.450 Education 17.971 Study and teaching 17.262 Religious aspects 16.643 Law and legislation 16.037 Research 15.745 Operas 15.434 Political aspects 15.344 African Americans 13.959 Symphonies 13.702 Music 13.369 Christianity 13.174 Motion pictures 12.970 Civilization 12.794 Management 12.068 Description and travel 12.056 Religion 12.029 Economic aspects 11.802 riduci ...