- 1956 to 19591
- 1960 to 19640
- 1965 to 19690
- 1970 to 19741
- 1975 to 19793
- 1980 to 19846
- 1985 to 198912
- 1990 to 19946
- 1995 to 19997
- 20002
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