Genre
Periodicals
422
Problems, exercises, etc
217
Early works to 1800
214
Instructional television programs
214
Instructional films
195
Textbooks
189
Congresses
153
History
151
Conference papers and proceedings
104
Problems and exercises
98
Educational films
84
Juvenile literature
79
Nonfiction television programs
64
Popular works
63
Juvenile works
50
Biography
46
Study guides
40
Formulae
36
Handbooks, manuals, etc
33
Tables
32
Case studies
30
Miscellanea
30
Biographies
27
Legislative hearings
27
Legislative materials
26
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
Filmed interviews
13
Children's films
12
Handbooks and manuals
12
Internet videos
12
Charts, diagrams, etc
11
Documentary television programs
11
Instructional and educational works
11
Statistics
11
Juvenile fiction
10
Short films
8
Academic theses
7
Early works
7
more ...