Género
Libros electrónicos
15
Electronic books
13
Electronic journals
8
Periodicals
8
Internet resources
5
Internet videos
4
Périodiques
4
Short films
4
Laboratory manuals
2
Computer network resources
1
Libros electr{acute}onicos
1
Manuales de laboratorio
1
Problemas, ejercicios, etc
1
Problems, exercises, etc
1