نوع المادة
Libros electrónicos
92
Periodicals
42
Electronic journals
41
Electronic books
19
Périodiques
13
Congresses
2
Case studies
1
Collections
1
Conference papers and proceedings
1
Congresos
1
Directories
1
Encyclopedias
1
Estudios de caso
1
Libros electr{acute}onicos
1
Revistas electrónicas
1
periodika
1