- 1980 to 198130
- 1982 to 198416
- 1985 to 198632
- 1987 to 198932
- 1990 to 19913
- 1992 to 19944
- 1995 to 19963
- 1997 to 19995
- 2000 to 20016
- 20022
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