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- Electronic books5,234
- Periodicals4,624
- Congresses4,249
- Biography3,633
- Case studies2,951
- Statistics2,053
- Handbooks, manuals, etc1,473
- History1,413
- Directories1,181
- Cross-cultural studies1,060
- Curricula1,025
- Sources905
- Bibliography511
- Pictorial works342
- Dictionaries299
- Catalogs282
- Early works to 1800276
- Interviews233
- Registers229
- Tracts (literary genre)208