- 1940 to 19442
- 1945 to 19490
- 1950 to 19540
- 1955 to 19592
- 1960 to 196411
- 1965 to 196921
- 1970 to 197426
- 1975 to 19793
- 1980 to 198435
- 198517
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