- 1956 to 19591
- 1960 to 19641
- 1965 to 19690
- 1970 to 19741
- 1975 to 19797
- 1980 to 198412
- 1985 to 198910
- 1990 to 19944
- 1995 to 19997
- 2000 to 20014
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