- 1956 to 19594
- 1960 to 19644
- 1965 to 19695
- 1970 to 1974152
- 1975 to 1979152
- 1980 to 1984135
- 1985 to 1989450
- 1990 to 19944
- 1995 to 19993
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