Genre
Libros electrónicos
232
Electronic books
29
Libros electronicos
22
Examinations, questions, etc
6
Congresses
4
Internet resources
4
Problems, exercises, etc
3
Handbooks, manuals, etc
2
Libros de texto
2
Libros de texto, manuales, etc
2
Libros electr{acute}onicos
2
Textbooks
2
Amateurs' manuals
1
Case studies
1
Congresos y asambleas
1
Dictionaries
1
Exámenes, tests, etc
1
Libros de texto para extranjeros
1
Periodicals
1
Problemas, ejercicios, etc
1
Problems and exercises
1
Publicaciones seriadas
1
Sources
1
Textbooks for foreign speakers
1