- 1940 to 19441
- 1945 to 19491
- 1950 to 19543
- 1955 to 19593
- 1960 to 196414
- 1965 to 196916
- 1970 to 19741
- 1975 to 19791
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