- 1977 to 19791
- 1980 to 19813
- 1982 to 19840
- 1985 to 19860
- 1987 to 198911
- 1990 to 19911
- 1992 to 19942
- 1995 to 199613
- 1997 to 199928
- 2000 to 200115
- 20027
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