Gênero
Libros electrónicos
383
Examinations
10
Exámenes
10
Libros electronicos
10
Examinations, questions, etc
3
Exámenes, cuestionarios, etc
3
Congresses
2
Libros electr{acute}onicos
2
Standards
2
Congresos
1
Handbooks, manuals, etc
1
Laboratory manuals
1
Libros de texto, manuales, etc
1
Periodicals
1
Publicaciones seriadas
1