Genre
Congresses
592
Conference papers and proceedings
409
Early works to 1800
331
Problems, exercises, etc
307
Textbooks
301
Instructional films
253
Instructional television programs
223
History
189
Problems and exercises
148
Educational films
115
Juvenile literature
110
Handbooks, manuals, etc
82
Nonfiction television programs
80
Popular works
71
Biography
69
Juvenile works
65
Study guides
58
Case studies
56
Periodicals
53
Tables
49
Statistics
48
Legislative materials
45
Formulae
42
Nonfiction films
41
Handbooks and manuals
39
Biographies
38
Internet videos
35
Juvenile films
34
Children's television programs
33
Fiction television programs
33
Miscellanea
33
Legislative hearings
32
Film excerpts
31
Academic theses
28
Educational television programs
28
Examinations
27
Examinations, questions, etc
24
Early works
22
Technical reports
22
Dictionaries
20
Mathematical formulae
20
Fiction
19
Bibliography
18
Children's films
18
Trivia and miscellanea
17
Criticism, interpretation, etc
16
Documentary films
15
Short films
15
Charts, diagrams, etc
14
Filmed interviews
13
more ...