History 26,249 Electronic books 8,853 Congresses 6,107 Conference papers and proceedings 6,003 Sources 4,079 Periodicals 3,596 Biography 3,046 Biographies 3,033 Early works to 1800 2,079 Treaties 1,983 Bibliography 1,228 Criticism, interpretation, etc 1,206 Internet videos 1,096 Legislative hearings 935 Early works 903 Dictionaries 834 Case studies 815 Television news programs 798 Bibliographies 773 Autobiographies 757 Legislative materials 714 Military history 697 Academic theses 636 Educational films 590 Messages 504 Aufsatzsammlung 464 Video recordings 457 Congrès 454 Correspondence 443 Exhibition catalogs 440 Exhibitions 430 Electronic journals 426 Interviews 424 Fiction 422 Festschriften 388 Broadsides 379 Church history 374 Catalogs 351 Personal correspondence 333 Thèses et écrits académiques 333 Actes de congrès 294 Records and correspondence 289 Traités 271 Documentary films 260 Conference papers and proceedings 255 Personal narratives 237 Diaries 222 Naval history 182 Speeches 182 Legislative histories 179 Essays 176 Périodiques 173 dissertations 173 Directories 171 Academic Dissertation 162 Handbooks, manuals, etc 156 Pictorial works 153 Archives 149 Pamphlets 147 Handbooks and manuals 141 Kongress 138 Textbooks 134 Forecasts 133 collective biographies 129 doctoral dissertations 127 masters theses 127 theses 127 Electronic book 126 Périodiques 125 Chronology 123 Congress 123 Encyclopedias 120 Nonfiction films 118 Chronologies 116 Études de cas 115 Indexes 113 proceedings (reports) 110 Feature films 103 Government publications 101 Maps 101 Drama 98 Computer network resources 97 Cross-cultural studies 97 Informational works 97 Collections 96 Poetry 96 Miscellanea 94 Congrès 92 Hochschulschrift 92 Databases 91 Trials, litigation, etc 91 Technical reports 90 Anecdotes 79 Controversial literature 79 Quelle 78 Caricatures and cartoons 77 Traités 77 Novels 76 Suspense fiction 73 Tracts (literary works) 72