Genre
Electronic books
3,267
Periodicals
366
Congresses
297
Documentary films
223
Juvenile literature
188
Documentary television programs
161
Electronic journals
137
Case studies
107
Electronic book
105
Nature television programs
85
Biography
63
Science television programs
60
Nonfiction television programs
48
Pictorial works
38
DVD-Video discs
31
Nonfiction films
31
Wildlife television programs
30
Educational films
26
Identification
26
Environmental films
23
Textbooks
23
Classification
21
Cross-cultural studies
21
Encyclopedias
21
Popular works
21
Handbooks, manuals, etc
20
Feature films
19
Guidebooks
17
Anecdotes
16
Poetry
16
Video recordings for the hearing impaired
14
Fiction
13
Maps
13
Educational television programs
12
Short films
12
Sources
12
History
8
Videocassettes
8
Dictionaries
7
Essays
7
Exhibitions
7
Forecasts
7
Panel discussions
7
Folklore
6
Internet videos
6
Juvenile fiction
6
Television news programs
6
Atlases
5
Bibliography
5
Filmed lectures
5
more ...