- 1966 to 19673
- 1968 to 196938
- 1970 to 197149
- 1972 to 197352
- 1974 to 197535
- 1976 to 197729
- 1978 to 197920
- 1980 to 19819
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