Genre
Electronic books
7,168
Congresses
1,485
Periodicals
1,128
Early works to 1800
564
Problems, exercises, etc
409
Electronic journals
360
Libros electronicos
334
Instructional television programs
229
Electronic book
215
Educational films
196
Textbooks
187
Education films
167
Popular works
140
Juvenile literature
130
Instructional films
105
Tables
105
Biography
98
Handbooks, manuals, etc
85
Nonfiction television programs
66
Miscellanea
63
Study guides
63
Case studies
56
Examinations, questions, etc
53
Formulae
37
Film excerpts
31
Statistics
29
Bibliography
26
Dictionaries
26
Early works to 1900
26
Fiction
24
Publicaciones seriadas
22
Documentary films
21
Nonfiction films
21
Problems and exercises
18
Publicaciones periodicas
18
Encyclopedias
16
Problemas, ejercicios, etc
14
Charts, diagrams, etc
13
Documentary television programs
13
Filmed interviews
13
Humor
13
Terminology
13
History
12
Catalogs
11
Anecdotes
10
Interviews
10
Juvenile fiction
10
Mathematical recreations
10
Sources
10
DVD-Video discs
9
more ...