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- Congresses17,836
- Periodicals9,036
- Exhibitions8,870
- Pictorial works7,634
- Conference papers and proceedings5,293
- Electronic books4,833
- Biography4,525
- Handbooks, manuals, etc3,959
- Catalogs3,038
- Dictionaries1,734
- History1,708
- Exhibition catalogs1,677
- Handbooks and manuals1,675
- Portraits1,415
- Photobooks1,389
- Case studies977
- Directories904
- Statistics716
- Nonfiction films616
- Early works to 1800586