Genre
Periodicals
422
Problems, exercises, etc
221
Early works to 1800
215
Instructional television programs
214
Textbooks
197
Instructional films
195
Congresses
159
History
154
Conference papers and proceedings
111
Problems and exercises
99
Educational films
84
Juvenile literature
79
Nonfiction television programs
64
Popular works
64
Juvenile works
50
Biography
46
Study guides
40
Formulae
36
Handbooks, manuals, etc
34
Tables
32
Academic theses
31
Case studies
30
Miscellanea
30
Biographies
27
Legislative hearings
27
Legislative materials
26
dissertations
26
exercise books
25
Nonfiction films
24
Juvenile films
23
Children's television programs
22
Fiction television programs
22
Examinations
21
Examinations, questions, etc
21
Educational television programs
18
Fiction
17
Mathematical formulae
16
Bibliography
15
Documentary films
15
Trivia and miscellanea
15
Dictionaries
14
Handbooks and manuals
14
Filmed interviews
13
Children's films
12
Instructional and educational works
12
Internet videos
12
Charts, diagrams, etc
11
Documentary television programs
11
Statistics
11
Juvenile fiction
10
more ...