- 1980 to 19815
- 1982 to 198310
- 1984 to 198535
- 1986 to 198743
- 1988 to 19895
- 1990 to 19913
- 1992 to 19933
- 1994 to 19953
- 1996 to 19973
- 1998 to 19993
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