History 26,225 Electronic books 8,655 Congresses 6,101 Conference papers and proceedings 6,003 Sources 4,072 Periodicals 3,600 Biography 3,039 Biographies 3,029 Early works to 1800 2,061 Treaties 1,981 Bibliography 1,226 Criticism, interpretation, etc 1,203 Internet videos 1,098 Legislative hearings 935 Early works 902 Dictionaries 835 Case studies 815 Television news programs 799 Bibliographies 773 Autobiographies 756 Legislative materials 714 Military history 694 Academic theses 636 Educational films 590 Messages 504 Congrès 473 Aufsatzsammlung 460 Video recordings 458 Correspondence 442 Exhibition catalogs 434 Electronic journals 425 Interviews 425 Exhibitions 424 Fiction 421 Festschriften 389 Broadsides 379 Church history 370 Catalogs 350 Thèses et écrits académiques 334 Personal correspondence 333 Records and correspondence 291 Actes de congrès 290 Traités 271 Documentary films 262 Conference papers and proceedings 255 Personal narratives 236 Diaries 221 Naval history 182 Speeches 182 Legislative histories 179 Essays 175 dissertations 175 Directories 171 Academic Dissertation 163 Périodiques 157 Handbooks, manuals, etc 156 Pictorial works 153 Archives 149 Pamphlets 148 Périodiques 143 Handbooks and manuals 141 Kongress 137 Textbooks 134 Forecasts 133 doctoral dissertations 127 masters theses 127 theses 127 Electronic book 126 collective biographies 125 Chronology 123 Encyclopedias 121 Congress 120 Nonfiction films 120 Études de cas 117 Chronologies 116 Indexes 113 proceedings (reports) 107 Feature films 106 Government publications 102 Maps 101 Drama 100 Computer network resources 97 Cross-cultural studies 97 Collections 96 Poetry 96 Congrès 95 Informational works 95 Miscellanea 94 Trials, litigation, etc 92 Databases 91 Technical reports 90 Hochschulschrift 88 Anecdotes 79 Controversial literature 78 Caricatures and cartoons 77 Novels 77 Quelle 76 Traités 76 reference 76 referencia 76