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Subject (Genre)
- Instructional films302
- Internet videos241
- Nonfiction films228
- Congresses199
- Electronic books166
- Periodicals131
- Software77
- Educational films70
- Audiobooks47
- Study guides42
- Webcast38
- Short films30
- Conference papers and proceedings29
- Handbooks, manuals, etc29
- Handbooks and manuals22
- Case studies18
- Electronic book14
- Television news programs13
- History12
- Interviews10