- 1940 to 19441
- 1945 to 19490
- 1950 to 19540
- 1955 to 19590
- 1960 to 19645
- 1965 to 19695
- 1970 to 19740
- 1975 to 19790
- 1980 to 19844
- 1985 to 19896
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