Zvrst
Libros electrónicos
729
Electronic books
180
Problems, exercises, etc
55
Periodicals
36
Libros electronicos
33
Internet resources
26
Publicaciones seriadas
22
Problemas, ejercicios, etc
18
Handbooks, manuals, etc
16
Publicaciones periódicas
14
Textbooks
14
Libros electr{acute}onicos
9
Libros de texto
6
Outlines, syllabi, etc
6
Computer network resources
5
Congresses
5
Formulae
5
Problemas
5
Popular works
4
Problemas y ejercicios
4
Tables
4
Biography
2
Case studies
2
Examinations, questions, etc
2
Manuales, etc
2
Problems, excersices, etc
2
Study and teaching (Elementary)
2
Comic books, strips, etc
1
Conference papers and proceedings
1
Congresos
1
Congresos y asambleas
1
Cómics, viñetas, etc
1
Didactic fiction
1
Discursos, ensayos, conferencias
1
Exámenes, preguntas, etc
1
Fiction
1
Fórmulas
1
Libros de texto, manuales, etc
1
Manuales
1
Miscellanea
1
Modelos matemáticos
1
Notebooks, sketchbooks, etc
1
Obras de divulgación
1
Problems and exercises
1
Romance fiction
1
Study and teaching
1
Study guides
1
Terminology
1