Είδος
Libros electrónicos
802
Periodicals
534
Electronic journals
400
Périodiques
90
Publicaciones seriadas
76
Electronic books
64
Publicaciones periódicas
39
Revistas electrónicas
19
Internet resources
8
Classification
5
Libros electronicos
5
Congresses
3
Outlines
3
Outlines, syllabi, etc
3
Textbooks
3
Bibliography
2
Computer network resources
2
Examination Questions
2
Examinations, questions, etc
2
Handbooks, manuals, etc
2
Internet videos
2
Libros de texto
2
Libros electrónicos
2
Periodical
2
Popular works
2
Problems, exercises, etc
2
Short films
2
Biography
1
Laboratory manuals
1
Libros electr{acute}onicos
1
Mauales de laboratorio
1
Observations
1
Pâeriodiques
1
Problemas, ejercicios, etc
1
Study guides
1
Zeitschrift
1
czasopisma
1
periodicals
1