- 19742
- 1975 to 19760
- 1977 to 19792
- 1980 to 19812
- 1982 to 19840
- 1985 to 198614
- 1987 to 198917
- 1990 to 19912
- 1992 to 19940
- 1995 to 19967
- 1997 to 199914
- 2000 to 200157
- 200213
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