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Subject (Genre)
- Internet videos104
- Educational films33
- Documentary television programs14
- Nature television programs8
- Science television programs8
- Documentary films7
- Environmental television programs4
- Nonfiction television programs4
- Alexander Street Video3
- Feature films2
- Nonfiction films2
- Short films2
- Children's films1
- Databases1
- Environmental films1
- Field recordings1
- Films1
- Films for foreign speakers1
- Instructional television programs1
- Juvenile films1