Electronic books 2,289 History 813 Periodicals 609 Documentary films 231 Television news programs 201 Electronic book 197 Congresses 152 Documentary television programs 146 Educational films 128 Conference papers and proceedings 119 Case studies 112 Biography 83 Statistics 81 Filmed speeches 72 Messages 61 Internet videos 60 Videorecording 51 Biographies 50 Nonfiction films 41 Interviews 37 Film clips 33 Feature films 30 Nonfiction television programs 30 Sources 19 Maps 18 Newsreels 14 Short films 14 Drama 13 Film excerpts 13 Filmed interviews 13 Panel discussions 13 Criticism, interpretation, etc 12 Instructional films 12 Cross-cultural studies 11 Documentary 11 Military history 11 Aufsatzsammlung 10 Handbooks, manuals, etc 9 Television interviews 9 Handbooks and manuals 8 Historical reenactments (Television programs) 8 Livres numériques 8 Academic theses 7 Bibliography 7 Unedited footage 7 Dictionaries 6 Encyclopedias 6 Environmental films 6 Historical television programs 6 microform 6 videorecording 6 Biographical films 5 Ethnographic films 5 Festschriften 5 Fiction films 5 Historical films 5 Television mini-series 5 Travelogues (Television programs) 5 Video recording 5 Congress 4 Diaries 4 Directories 4 Livres électroniques 4 Longitudinal studies 4 Pictorial works 4 Television series 4 Anecdotes 3 Autobiographies 3 Catalogs 3 Geschiedenis (vorm) 3 Local history 3 Naval history 3 Personal narratives 3 Reference works 3 Speeches 3 Television adaptations 3 Yearbooks 3 Computer network resources 2 Congressen (vorm) 2 Correspondence 2 Educational television programs 2 Eulogies 2 Film adaptations 2 Filmed lectures 2 Filmed panel discussions 2 ILO pub 2 Juvenile literature 2 Kongress 2 Livres électronique 2 Pub OIT 2 Trials, litigation, etc 2 cartographic material 2 Atlases 1 Bibliographies 1 Bronnen (vorm) 1 Cases 1 Casestudies (vorm) 1 Census 1 Census, 1860 1 Church history 1