- 1940 to 194420
- 1945 to 194923
- 1950 to 195415
- 1955 to 195916
- 1960 to 196415
- 1965 to 196915
- 1970 to 197414
- 1975 to 197914
- 1980 to 198415
- 1985 to 198915
- 1990 to 19942
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