- 1963 to 19641
- 1965 to 19690
- 1970 to 19740
- 1975 to 19791
- 1980 to 19845
- 1985 to 19892
- 1990 to 19941
- 1995 to 19994
- 20001
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