Tür
Libros electrónicos
15
Electronic books
7
Electronic journals
6
Periodicals
6
Internet resources
3
Handbooks, manuals, etc
2
Internet videos
2
Short films
2
Tablas, cálculos, etc
2
Amateurs' manuals
1
Classification
1
Computer network resources
1
Dissertations
1
Manuales
1
Périodiques
1
Tesis inéditas
1