History 255 583 Politics and government 66 341 History and criticism 57 942 Social aspects 34 009 Social conditions 30 807 Philosophy 28 277 Criticism and interpretation 25 534 plus ... Jazz 23 847 Foreign relations 19 746 Economic conditions 19 609 Women 19 394 Social life and customs 18 894 Piano music 18 450 Education 17 970 Study and teaching 17 262 Religious aspects 16 639 Law and legislation 16 037 Research 15 744 Operas 15 434 Political aspects 15 343 African Americans 13 959 Symphonies 13 702 Music 13 369 Christianity 13 171 Motion pictures 12 970 Civilization 12 794 Management 12 068 Description and travel 12 056 Religion 12 028 Economic aspects 11 802 moins ...