- 1910 to 191955
- 1920 to 192959
- 1930 to 193954
- 1940 to 194954
- 1950 to 195950
- 1960 to 196950
- 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