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Subject (Genre)
- Internet videos42
- Educational films39
- Congresses21
- Biography9
- Electronic books5
- Nonfiction films5
- Instructional films4
- Interviews4
- Popular works4
- Documentary films3
- Documentary television programs3
- Problems, exercises, etc3
- Videorecording3
- Bibliography2
- Educational television programs2
- Periodicals2
- Short films2
- Computer network resources1
- Documentaries and Factual Films1
- History1