- 1900 to 19092
- 1910 to 19197
- 1920 to 19296
- 1930 to 19399
- 1940 to 19495
- 1950 to 195911
- 1960 to 1969725
- 1970 to 1979230
- 1980 to 19893,616
- 1990 to 19911
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