- 1952 to 19544
- 1955 to 19590
- 1960 to 196410
- 1965 to 196913
- 1970 to 19744
- 1975 to 19795
- 1980 to 198415
- 1985 to 19892
- 1990 to 19940
- 19952
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