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Subject (Genre)
- Congresses8,120
- Instructional films2,700
- Periodicals2,428
- Electronic books2,026
- Internet videos1,763
- Handbooks, manuals, etc1,531
- Nonfiction films1,501
- Study guides1,392
- Conference papers and proceedings1,017
- Computer network resources869
- Web sites717
- Legislative hearings605
- Handbooks and manuals601
- Data sets474
- Educational films459
- Academic theses431
- Case studies334
- Software317
- Television news programs316
- Audiobooks282