Electronic books 878 Instructional television programs 208 Instructional films 177 Congresses 135 Problems, exercises, etc 129 Electronic book 83 History 80 Conference papers and proceedings 78 Educational films 78 Specimens 59 Nonfiction television programs 56 Problems and exercises 56 Popular works 54 Study guides 43 Textbooks 42 Examinations, questions, etc 31 Miscellanea 29 Periodicals 29 Biography 23 Examinations 22 Formulae 20 Juvenile literature 19 Case studies 17 Handbooks, manuals, etc 17 Dictionaries 13 Filmed interviews 13 Tables 11 Documentary films 10 Biographies 9 Internet videos 8 Juvenile fiction 8 Anecdotes 7 Film excerpts 6 Trivia and miscellanea 6 Videorecording 6 Documentary television programs 5 Fiction 5 Mathematical formulae 5 Quotations, maxims, etc 5 Short films 5 Humor 4 Livres électroniques 4 Outlines, syllabi, etc 4 Television news programs 4 Catalogs 3 Computer network resources 3 Correspondence 3 Criticism, interpretation, etc 3 Early works to 1800 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 Personal correspondence 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 Encyclopedias 1 Examination Questions 1 Formulae, receipts, prescriptions 1 Indexes 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 Puzzles and games 1 chart 1