Zvrst
Electronic books
285
Libros electrónicos
179
Electronic journals
89
Periodicals
80
Internet resources
57
Internet videos
28
Short films
28
Handbooks, manuals, etc
23
Computer network resources
14
Périodiques
13
Congresses
11
Problems, exercises, etc
7
Libros electronicos
6
Outlines, syllabi, etc
6
Study guides
6
Textbooks
5
Case studies
4
Tables
4
Amateurs' manuals
3
Conference papers and proceedings
3
Formulae
3
Atlases
2
Fiction
2
Libros de texto, manuales, etc
2
Problemas, ejercicios, etc
2
Revistas electrónicas
2
Statistics
2
Biographies
1
Biography
1
Design and construction
1
Estadísticas
1
Exhibiciones
1
Exhibitions
1
Experiments
1
Guidebooks
1
Illustrated works
1
Laboratory manuals
1
Libros de texto
1
Libros electr{acute}onicos
1
Pictorial works
1
Problemas
1
Publicaciones periódicas
1
Sources
1
Standards
1
methods
1