- 1977 to 19796
- 1980 to 19816
- 1982 to 19846
- 1985 to 19866
- 1987 to 19896
- 1990 to 19916
- 1992 to 19946
- 1995 to 19966
- 1997 to 19996
- 2000 to 20016
- 2002 to 20036
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