- 1970 to 197130
- 1972 to 197330
- 1974 to 197530
- 1976 to 197730
- 1978 to 197930
- 1980 to 19810
- 1982 to 19831
- 1984 to 19850
- 19862
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