- 1808 to 18193
- 1820 to 18394
- 1840 to 185940
- 1860 to 1879335
- 1880 to 1899141
- 1900 to 1919267
- 1920 to 193919
- 1940 to 19596
- 1960 to 19788
The preservation of the Duke University Libraries Digital Collections and the Duke Digital Repository programs are supported in part by the Lowell and Eileen Aptman Digital Preservation Fund