- 1956 to 19591
- 1960 to 19642
- 1965 to 19690
- 1970 to 19740
- 1975 to 19795
- 1980 to 19849
- 1985 to 198916
- 1990 to 199410
- 1995 to 199915
- 2000 to 200212
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