- 1986 to 19871
- 1988 to 19890
- 1990 to 19911
- 1992 to 19930
- 1994 to 19954
- 1996 to 199715
- 1998 to 19998
- 2000 to 20014
- 20023
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