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Subject (Genre)
- Early works to 18006,501
- Periodicals5,335
- Congresses3,082
- Periodical1,922
- Biography1,895
- Internet videos1,317
- Bibliography1,291
- Handbooks, manuals, etc1,116
- Dictionaries924
- History691
- Conference papers and proceedings617
- Electronic books582
- Formulae, receipts, prescriptions577
- Educational films560
- Nonfiction films560
- Examinations, questions, etc534
- Catalogs514
- Case studies468
- Broadsides453
- Examination Questions448