- 1956 to 19592
- 1960 to 19641
- 1965 to 19690
- 1970 to 19740
- 1975 to 19799
- 1980 to 198416
- 1985 to 198921
- 1990 to 199427
- 1995 to 199918
- 2000 to 20025
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