- 1955 to 19592
- 1960 to 19640
- 1965 to 19690
- 1970 to 19741
- 1975 to 19792
- 1980 to 198413
- 1985 to 19896
- 1990 to 199411
- 1995 to 19994
- 2000 to 20025
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