- 1986 to 19873
- 1988 to 198911
- 1990 to 19910
- 1992 to 19930
- 1994 to 19950
- 1996 to 19975
- 1998 to 19992
- 2000 to 20014
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