- 1896 to 189950
- 1900 to 190949
- 1910 to 191949
- 1920 to 192951
- 1930 to 193961
- 1940 to 194955
- 1950 to 195950
- 1960 to 196951
- 1970 to 197951
- 1980 to 198951
- 1990 to 199452
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