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- Statistics38
- Biography21
- Bibliography12
- History10
- Electronic books7
- Sources7
- Census, 18th, 19605
- Case studies4
- Census, 19th, 19704
- Databases4
- Documentary films4
- Interviews4
- Nonfiction films4
- Broadsides3
- CD-ROMs3
- Census, 16th, 19403
- Congresses3
- Fiction3
- Census, 20th, 19802
- Census, 22nd, 20002