Electronic books 5,715 History 2,043 Electronic book 456 Criticism, interpretation, etc 409 Congresses 323 Case studies 290 Conference papers and proceedings 257 Biography 223 Documentary films 206 Educational films 191 Internet videos 165 Periodicals 163 Videorecording 145 Biographies 131 Cross-cultural studies 113 Interviews 52 Television news programs 49 Documentary television programs 43 Nonfiction films 35 Congress 33 Instructional films 32 Sources 32 Feature films 31 Military history 29 Personal narratives 27 Aufsatzsammlung 26 Livres électronique 25 Encyclopedias 21 Livres électroniques 21 Short films 21 Film excerpts 20 Popular works 18 Film clips 17 Correspondence 14 Livres numériques 14 Anecdotes 11 Drama 11 Humor 11 Statistics 11 Filmed interviews 10 Filmed lectures 10 Longitudinal studies 10 Personal correspondence 10 Trials, litigation, etc 10 Documentary 9 Music 9 Pictorial works 9 Church history 8 Festschriften 8 Folklore 8 Handbooks and manuals 8 Juvenile literature 8 Lectures 8 Miscellanea 8 Computer network resources 7 Ethnographic films 7 Handbooks, manuals, etc 7 Local history 7 Academic theses 6 Environmental films 6 Exhibitions 6 Filmed panel discussions 6 Personal Narrative 6 Terminology 6 Textbooks 6 videorecording 6 Art 5 Autobiographies 5 Bibliography 5 Diaries 5 Dictionaries 5 Educational television programs 5 Essays 5 Fiction films 5 Geschiedenis (vorm) 5 Nonfiction television programs 5 Translations 5 Biographical films 4 Blogs 4 Case Reports 4 Cases 4 Comic books, strips, etc 4 Early works to 1800 4 Exhibition catalogs 4 Fiction 4 Forecasts 4 Reference works 4 Rules 4 Songs and music 4 Television mini-series 4 Animated films 3 Anthologies 3 Art and the war 3 Bibliographies 3 Chronology 3 Classification 3 Congressen (vorm) 3 Environmental television programs 3 Independent films 3 Juvenile fiction 3