- 1973 to 19743
- 1975 to 19791
- 1980 to 19840
- 1985 to 19890
- 1990 to 19940
- 1995 to 19990
- 2000 to 20044
- 2005 to 20093
- 201028
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