- 1968 to 19691
- 1970 to 19742
- 1975 to 197912
- 1980 to 198427
- 1985 to 198923
- 1990 to 199419
- 1995 to 199936
- 2000 to 200215
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