- 1967 to 196914
- 1970 to 19741
- 1975 to 19791
- 1980 to 19840
- 1985 to 19891
- 1990 to 19940
- 1995 to 19992
- 2000 to 20021
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