- 198711
- 1988 to 19891
- 1990 to 19911
- 1992 to 19930
- 1994 to 19956
- 1996 to 199714
- 1998 to 199917
- 2000 to 200110
- 200230
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