Gènere
Libros electrónicos
460
Periodicals
263
Publicaciones periódicas
171
Electronic journals
82
Electronic books
20
Périodiques
14
Revistas electrónicas
6
Libros electronicos
5
Congresses
2
Manuales
2
Abstracts
1
Conference papers and proceedings
1
Data processing
1
Humor
1
Internet resources
1
Internet videos
1
Libros electr{acute}onicos
1
Popular works
1
Short films
1
Statistics
1
Textbooks
1