- 1910 to 191912
- 1920 to 192911
- 1930 to 193911
- 1940 to 194914
- 1950 to 19590
- 1960 to 19690
- 1970 to 19790
- 1980 to 19890
- 1990 to 19942
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