סוגה
Electronic books
243
Congresses
182
Periodicals
29
Popular works
25
Electronic journals
7
Documentary films
6
Electronic book
6
Textbooks
6
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5
Educational films
3
Short films
3
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2
Feature films
2
History
2
Computer network resources
1
Constitution
1
DVD-Video discs
1
Dictionaries
1
Essays
1
Informational works
1
Instructional films
1
Juvenile literature
1
Libros electronicos
1
Nonfiction films
1
Nonfiction television programs
1
Science films
1