Genre
Libros electrónicos
177
Periodicals
64
Electronic journals
59
Libros electronicos
13
Electronic books
9
Examinations, questions, etc
6
Revistas electrónicas
4
Périodiques
3
Congresses
2
Handbooks, manuals, etc
2
Libros de texto, manuales, etc
2
Newspapers
2
Problems, exercises, etc
2
Congresos y asambleas
1
Dictionaries
1
Exámenes, tests, etc
1
Libros de texto
1
Libros electr{acute}onicos
1
Problems and exercises
1
Publicaciones seriadas
1
Textbooks
1