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Subject (Genre)
- Periodicals202
- Congresses174
- Internet videos169
- Handbooks, manuals, etc109
- Conference papers and proceedings104
- Educational films71
- Early works to 180066
- Academic theses65
- Dictionaries54
- Biography49
- Handbooks and manuals35
- Nonfiction films30
- Electronic books27
- Exhibitions12
- Problems, exercises, etc11
- Tables9
- Bibliography8
- Indexes8
- Dissertations, Academic7
- History7