- 1920 to 192415
- 1925 to 192915
- 1930 to 193414
- 1935 to 193914
- 1940 to 194414
- 1945 to 194918
- 1950 to 195421
- 1955 to 195921
- 1960 to 196414
- 1965 to 196914
- 1970 to 197415
- 1975 to 197915
- 1980 to 19840
- 1985 to 19890
- 1990 to 19932
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