Electronic books 1,880 History 298 Congresses 187 Electronic book 166 Conference papers and proceedings 140 Case studies 91 Educational films 89 Internet videos 81 Documentary films 74 Videorecording 70 Television news programs 54 Statistics 29 Nonfiction films 25 Congress 24 Documentary television programs 23 Criticism, interpretation, etc 21 Cross-cultural studies 18 Biography 17 Biographies 11 Aufsatzsammlung 10 Interviews 8 Academic theses 7 Feature films 6 Environmental films 5 Handbooks, manuals, etc 5 Livres électronique 5 Livres électroniques 5 Panel discussions 5 Congressen (vorm) 4 Documentary 4 Film clips 4 Military history 4 Patents 4 Cases 3 Drama 3 Instructional films 3 Longitudinal studies 3 Periodicals 3 Trials, litigation, etc 3 Computer network resources 2 Congresos 2 Directories 2 Encyclopedias 2 Festschriften 2 Filmed interviews 2 Filmed lectures 2 Handbooks and manuals 2 Livre électronique (Descripteur de forme) 2 Livres numériques 2 Newsreels 2 Nonfiction television programs 2 Popular works 2 Ressource Internet (Descripteur de forme) 2 Short films 2 Streaming video 2 Television interviews 2 Television program clips 2 Unedited footage 2 Bibliographies 1 Bibliography 1 Biographical films 1 Case Reports 1 Census, 1860 1 Claims 1 Cost effectiveness 1 Dystopias 1 Encyclopedieën (vorm) 1 Environmental television programs 1 Essays 1 Exhibition catalogs 1 Exhibitions 1 Experimental films 1 Fiction 1 Fiction films 1 Fiction television programs 1 Field guides 1 Film adaptations 1 Film excerpts 1 Forecasts 1 Gelegenheidsuitgaven (vorm) 1 Genealogy 1 Geschiedenis (vorm) 1 Gothic fiction 1 Historical films 1 Identification 1 Interactive videos 1 Interviews (vorm) 1 Lectures 1 Lehrbuch 1 Love stories 1 Made-for-TV movies 1 Methods (Music) 1 Nurses Instruction 1 Ok Tedi Region 1 Personal narratives, American 1 Popular Work 1 Problems and Exercises 1 Problems and exercises 1 Rules 1 Science films 1