- 1850 to 185953
- 1860 to 1879160
- 1880 to 189949
- 1900 to 191993
- 1920 to 19393
- 1940 to 19593
- 1960 to 19793
- 1980 to 19993
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