- 1986 to 19871
- 1988 to 19890
- 1990 to 19911
- 1992 to 19931
- 1994 to 19952
- 1996 to 19974
- 1998 to 19990
- 2000 to 20012
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