Είδος
Electronic books
582
Internet resources
247
Handbooks, manuals, etc
61
Computer network resources
37
Libros electrónicos
36
Amateurs' manuals
15
Case studies
7
Congresses
7
Study guides
7
Outlines, syllabi, etc
6
Tables
6
Libros electronicos
5
Formulae
4
Pictorial works
4
Problems, exercises, etc
4
Textbooks
4
Biography
3
Terminology
2
Autobiographies
1
Charts, diagrams, etc
1
Classification
1
Conference papers and proceedings
1
Congresos y asambleas
1
Dictionaries
1
Interviews
1
Libros electr{acute}onicos
1
Popular works
1
Programming
1
Recetas
1
Standards
1