Είδος
Libros electrónicos
198
Periodicals
141
Electronic journals
135
Périodiques
40
Electronic books
32
Libros electronicos
7
Congresses
5
Popular works
3
Revistas electrónicas
3
Congresos
2
Examination Questions
2
Examinations, questions, etc
2
Internet videos
2
Outlines
2
Outlines, syllabi, etc
2
Short films
2
Analysis
1
Animal models
1
Computer network resources
1
Conference papers and proceedings
1
Laboratory manuals
1
Libros electr{acute}onicos
1
Obras de divulgación
1
Problems, exercises, etc
1
Publicaciones seriadas
1
Zeitschrift
1
periodicals
1