- 1972 to 197415
- 1975 to 197613
- 1977 to 197917
- 1980 to 198131
- 1982 to 198459
- 1985 to 198620
- 1987 to 198930
- 1990 to 199113
- 1992 to 199412
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