Genre
Periodicals
49
Electronic journals
46
Electronic books
29
Internet resources
12
Périodiques
8
Study guides
6
Libros electrónicos
5
Handbooks, manuals, etc
4
Computer network resources
3
Directories
2
Newspapers
2
Biografía
1
Biography
1
Case studies
1
Catalogs
1
Pictorial works
1
Problems, exercises, etc
1
Standards
1