- 1978 to 19794
- 1980 to 19810
- 1982 to 19840
- 1985 to 19860
- 1987 to 19894
- 1990 to 19911
- 1992 to 19940
- 1995 to 19961
- 1997 to 19994
- 2000 to 20010
- 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