Electronic books 2,746 Congresses 542 Conference papers and proceedings 351 History 232 Electronic book 231 Periodicals 212 Educational films 181 Documentary films 132 Internet videos 107 Case studies 95 Congress 80 Handbooks, manuals, etc 75 Biography 74 Bibliography 66 Television news programs 55 Dictionaries 54 Documentary television programs 53 Popular works 47 Videorecording 45 Biographies 36 Filmed lectures 34 Handbooks and manuals 32 Interviews 28 Streaming video 25 Nonfiction films 24 Computer network resources 23 Statistics 23 Video recording 23 Cross-cultural studies 22 Instructional films 21 Nonfiction television programs 20 Encyclopedias 19 Educational television programs 18 Film excerpts 18 Instructional television programs 16 Laboratory manuals 16 Livres électronique 15 Abstracts 14 Directories 14 Criticism, interpretation, etc 13 Short films 12 Sources 10 Aufsatzsammlung 9 Fiction 9 Methods (Music) 9 Anecdotes 8 Guideline 8 Juvenile literature 8 Longitudinal studies 8 Textbooks 8 electronic resource 8 Academic theses 7 Bibliographies 7 Livres électroniques 7 Livres numériques 6 Case Reports 5 Educational 5 Medical television programs 5 Newsreels 5 Observations 5 Bio-bibliography 4 Feature films 4 Guide (Descripteur de forme) 4 Kongress 4 Problems, exercises, etc 4 Rules and practice 4 Terminology 4 Classification 3 Documentary 3 Einführung 3 Festschrift 3 Guidebooks 3 Miscellanea 3 Non-fiction films 3 Pictorial works 3 Review 3 Rules 3 Actes de congrès 2 Book reviews 2 Congressen (vorm) 2 Data processing 2 Databases 2 Dictionary 2 Drama 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 Maps 2 Methods 2 Personal Narrative 2 Photomicrography 2 Popular Work 2 Problems and exercises 2 Ratgeber 2