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Subject (Genre)
- Congresses8,122
- Instructional films2,624
- Periodicals2,429
- Electronic books2,031
- Internet videos1,686
- Handbooks, manuals, etc1,527
- Nonfiction films1,425
- Study guides1,374
- Conference papers and proceedings1,016
- Computer network resources869
- Web sites717
- Legislative hearings605
- Handbooks and manuals601
- Data sets470
- Educational films459
- Academic theses429
- Case studies332
- Software317
- Television news programs316
- Directories280