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- Electronic books53,943
- Correspondence16,129
- Records (Documents)14,458
- Congresses11,924
- Internet videos11,454
- Case studies9,117
- Conference papers and proceedings6,716
- Biography5,751
- Periodicals4,106
- Documentary films4,089
- Fiction3,919
- Nonfiction films3,387
- Sources3,144
- Poetry2,955
- Handbooks, manuals, etc2,651
- Feature films2,493
- Television news programs2,394
- Drama1,825
- Early works to 18001,777
- Tracts (literary genre)1,719