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Genre
- Electronic books663,010
- Legislative materials100,707
- Legislative hearings78,464
- Internet videos45,156
- Periodicals34,071
- Streaming audio30,550
- Interviews28,571
- Oral histories27,944
- Conference papers and proceedings23,937
- Documentary films23,937
- Newspapers19,189
- Electronic newspapers16,798
- Feature films16,658
- Electronic journals15,615
- Business correspondence15,282
- Instructional films15,020
- Nonfiction films12,527
- Scores12,509
- Bibliographies11,703
- Photographs11,295