Gènere
Electronic books
Internet resources
247
Handbooks, manuals, etc
62
Computer network resources
37
Congresses
13
Problems, exercises, etc
12
Amateurs' manuals
8
Pictorial works
8
Case studies
7
Biography
6
Outlines, syllabi, etc
6
Study guides
6
Tables
6
Formulae
4
Handbooks and manuals
4
Textbooks
4
Biographies
2
Charts, diagrams, etc
2
Conference papers and proceedings
2
Cookbooks
2
Dictionaries
2
Instructional and educational works
2
Laboratory manual
2
Laboratory manuals
2
Problems and exercises
2
Software
2
Style manuals
2
Terminology
2
Autobiographies
1
Catalogs
1
Classification
1
Correspondence
1
Designs and plans
1
Diaries
1
Early works to 1800
1
Formulae, receipts, prescriptions
1
Illustrated works
1
Interviews
1
Miscellanea
1
Poetry
1
Programmed instruction
1
Programming
1
Standards
1