- 1957 to 19592
- 1960 to 19640
- 1965 to 19690
- 1970 to 19741
- 1975 to 19796
- 1980 to 198437
- 1985 to 198921
- 1990 to 199413
- 1995 to 199921
- 2000 to 200111
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