Genre
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1,053
Short films
927
Electronic books
454
Internet resources
317
Computer network resources
60
Outlines, syllabi, etc
24
Handbooks, manuals, etc
18
Case studies
7
Tables
6
Problems, exercises, etc
5
Formulae
4
Study guides
2
Terminology
2
Amateurs' manuals
1
Analysis
1
Classification
1
Congresses
1
Observations
1
Standards
1
research
1