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- Congresses17,848
- Periodicals9,037
- Exhibitions8,870
- Pictorial works7,636
- Conference papers and proceedings5,298
- Electronic books4,833
- Biography4,525
- Handbooks, manuals, etc3,959
- Catalogs3,038
- Dictionaries1,734
- History1,708
- Exhibition catalogs1,678
- Handbooks and manuals1,675
- Portraits1,415
- Photobooks1,392
- Case studies977
- Directories906
- Statistics716
- Nonfiction films616
- Early works to 1800586