نوع المادة
Electronic books
196
Case studies
19
Congresses
13
Periodicals
11
Electronic book
9
Documentary television programs
7
Documentary films
5
Electronic journals
5
Handbooks, manuals, etc
4
DVD-Video discs
3
Nonfiction films
3
Designs and plans
2
Libros electronicos
2
Conference papers and proceedings
1
Cross-cultural studies
1
Encyclopedias
1
Environmental films
1
Environmental television programs
1
Estudio de casos
1
Exhibitions
1
Filmed lectures
1
Films for the hearing impaired
1
Geographic information systems
1
Juvenile literature
1
Poetry
1
Television news programs
1
Television series
1
Études de cas
1