History 6 776 Congresses 3 506 Bibliography 3 278 Biography 2 858 Politics and government 2 131 History and criticism 1 903 Criticism and interpretation 1 288 mer ... Education 1 103 Economic conditions 974 Foreign relations 847 Philosophy 846 Social conditions 845 Study and teaching 815 Management 781 Exhibitions 737 Handbooks, manuals, etc 721 Case studies 718 Women 666 Research 639 Law and legislation 632 Description and travel 612 Social aspects 606 Psychological aspects 584 Economic policy 562 Psychology 534 Data processing 519 Dictionaries 500 Architecture 481 English language 467 Catalogs 452 mindre ...