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- Periodicals44,850
- Congresses39,728
- Statistics29,074
- Biography23,256
- Case studies23,048
- Electronic books22,616
- History9,124
- Sources4,948
- Directories4,252
- Handbooks, manuals, etc3,767
- Dictionaries3,363
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- Interviews2,962
- Cross-cultural studies2,579
- Pictorial works1,959
- Documentary films1,936
- Bibliography1,805
- Nonfiction films1,789
- Audiobooks1,639
- Conference papers and proceedings1,399