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Subject (Genre)
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- Periodicals15,370
- Biography6,802
- Electronic books4,450
- Early works to 18002,949
- Dictionaries2,465
- Identification2,374
- Pictorial works2,311
- Classification2,271
- Conference papers and proceedings2,234
- Handbooks, manuals, etc2,160
- Internet videos1,861
- Nonfiction films1,765
- Instructional films1,757
- Laboratory manuals1,657
- Bibliography1,579
- Popular works1,562
- Tables1,560
- Atlases1,553
- Periodical1,479