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Subject (Genre)
- Case studies61
- Congresses11
- Educational films7
- Legislative hearings6
- Periodicals6
- Statistics6
- Nonfiction films5
- Handbooks, manuals, etc4
- Instructional films4
- Short films4
- Electronic books3
- Problems, exercises, etc3
- Textbooks2
- Audiobooks1
- Bibliography1
- Classification1
- Comic books, strips, etc1
- Documentary films1
- Electronic book1
- Handbooks and manuals1