نوع المادة
Libros electrónicos
192
Electronic books
50
Electronic journals
43
Periodicals
41
Internet resources
17
Internet videos
12
Examinations
10
Exámenes
10
Short films
9
Handbooks, manuals, etc
8
Périodiques
8
Revistas electrónicas
6
Libros electronicos
5
Computer network resources
3
Examinations, questions, etc
3
Exámenes, cuestionarios, etc
3
Congresses
2
Standards
2
Libros de texto, manuales, etc
1
Statistics
1
methods
1