- 1940 to 194413
- 1945 to 194913
- 1950 to 19540
- 1955 to 19590
- 1960 to 19641
- 1965 to 19697
- 1970 to 19740
- 1975 to 19790
- 1980 to 19841
- 1985 to 19894
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