Electronic books 775 Instructional television programs 208 Instructional films 189 Congresses 134 Problems, exercises, etc 128 History 81 Conference papers and proceedings 78 Educational films 77 Electronic book 66 Specimens 59 Problems and exercises 57 Nonfiction television programs 56 Study guides 43 Textbooks 43 Popular works 42 Examinations, questions, etc 31 Periodicals 29 Examinations 22 Formulae 20 Miscellanea 20 Biography 19 Juvenile literature 19 Case studies 17 Handbooks, manuals, etc 17 Filmed interviews 13 Biographies 10 Dictionaries 10 Documentary films 10 Juvenile fiction 8 Tables 8 Anecdotes 7 Internet videos 7 Film excerpts 6 Trivia and miscellanea 6 Documentary television programs 5 Fiction 5 Livres électroniques 5 Mathematical formulae 5 Quotations, maxims, etc 5 Short films 5 Videorecording 5 Criticism, interpretation, etc 4 Outlines, syllabi, etc 4 Television news programs 4 Catalogs 3 Computer network resources 3 Correspondence 3 Handbooks and manuals 3 Interviews 3 Juvenile works 3 Livres électronique 3 Nonfiction films 3 Quotations 3 Statistics 3 Television interviews 3 Terminology 3 Aufsatzsammlung 2 Bio-bibliography 2 Databases 2 Dictionaries, Juvenile 2 Early works 2 Early works to 1800 2 Humor 2 Personal correspondence 2 Puzzles and games 2 Reality-based 2 Study and teaching (Elementary) 2 Academic theses 1 Adaptations 1 Archives 1 Bibliographies 1 Bibliography 1 Charts, diagrams, etc 1 Comic books, strips, etc 1 Concordances 1 Congress 1 Cross-cultural studies 1 Designs and plans 1 Educational 1 Einführung 1 Examination Questions 1 Formulae, receipts, prescriptions 1 Instructional and educational works 1 Juvenile poetry 1 Kongress 1 Laboratory manuals 1 Life skills guides 1 Literary collections 1 Logic, Symbolic and mathematical 1 Mathematical fiction 1 Novels 1 Pictorial works 1 chart 1