Жанр
Electronic books
374
Internet resources
247
Computer network resources
37
Handbooks, manuals, etc
15
Congresses
7
Outlines, syllabi, etc
6
Case studies
4
Formulae
4
Tables
4
Amateurs' manuals
2
Problems, exercises, etc
2
Study guides
2
Classification
1
Dictionaries
1
Early works to 1800
1
Formulae, receipts, prescriptions
1
Interviews
1
Terminology
1