Genre
Libros electrónicos
110
Electronic books
14
Internet videos
12
Atlases
11
Electronic journals
9
Periodicals
9
Handbooks, manuals, etc
7
Outlines
7
Examination Questions
5
Examinations, questions, etc
5
Handbooks
4
Outlines, syllabi, etc
4
Atlas
3
Laboratory manuals
3
Laboratory Manuals
2
Libros electronicos
2
Périodiques
2
Programmed Instruction
2
Congresses
1
Discursos, ensayos, conferencias
1
Early works to 1800
1
Handbooks and manuals
1
Laboratory manual
1
Libros electr{acute}onicos
1
Libros electrónicos
1
Periodical
1
Pictorial works
1
Problems, exercises, etc
1
Short films
1
Study guides
1