- 1920 to 19296
- 1930 to 193917
- 1940 to 194941
- 1950 to 195957
- 1960 to 196914
- 1970 to 197921
- 1980 to 198937
- 1990 to 19972
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