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Subject (Genre)
- Internet videos82
- Educational films80
- Periodicals20
- Lectures18
- Electronic books9
- Congresses7
- Periodical6
- Academic Dissertation4
- Academic theses4
- Audiobooks4
- Biography4
- Documentary television programs4
- Longitudinal studies3
- Criticism, interpretation, etc2
- Essays2
- Instructional films2
- Nonfiction television programs2
- Short films2
- Textbooks2
- Videorecording2