Electronic books 2,613 Congresses 556 Conference papers and proceedings 367 History 245 Periodicals 212 Electronic book 197 Educational films 181 Documentary films 135 Internet videos 107 Case studies 94 Congress 84 Biography 75 Handbooks, manuals, etc 70 Bibliography 65 Documentary television programs 60 Television news programs 56 Dictionaries 54 Popular works 47 Videorecording 45 Biographies 37 Handbooks and manuals 35 Filmed lectures 34 Interviews 28 Statistics 27 Streaming video 25 Computer network resources 24 Nonfiction films 24 Video recording 23 Instructional films 22 Cross-cultural studies 21 Encyclopedias 21 Nonfiction television programs 20 Educational television programs 18 Film excerpts 18 Instructional television programs 16 Laboratory manuals 16 Abstracts 15 Criticism, interpretation, etc 15 Livres électronique 15 Directories 14 Short films 13 Methods (Music) 10 Sources 10 Academic theses 9 Aufsatzsammlung 9 Fiction 9 Anecdotes 8 Guideline 8 Juvenile literature 8 Longitudinal studies 8 Textbooks 8 electronic resource 8 Bibliographies 7 Livres électroniques 7 Wildlife television programs 7 Livres numériques 6 Case Reports 5 Educational 5 Feature films 5 Medical television programs 5 Newsreels 5 Observations 5 Bio-bibliography 4 Festschrift 4 Guide (Descripteur de forme) 4 Guidebooks 4 Kongress 4 Problems, exercises, etc 4 Rules and practice 4 Terminology 4 Documentary 3 Einführung 3 Methods 3 Miscellanea 3 Non-fiction films 3 Pictorial works 3 Reference works 3 Review 3 Rules 3 Actes de congrès 2 Archives 2 Book reviews 2 Classification 2 Congressen (vorm) 2 Data processing 2 Databases 2 Dictionary 2 Drama 2 Encyclopedia 2 Essays 2 Evaluation Study 2 Examinations 2 Filmed panel discussions 2 Genealogy 2 Handboeken (vorm) 2 Humor 2 Juvenile works 2 Laboratory Manual 2 Livre électronique (Descripteur de forme) 2 Manuals (Handbooks) 2