- 1890 to 18991
- 1900 to 19091
- 1910 to 191938
- 1920 to 1929235
- 1930 to 1939225
- 1940 to 1949186
- 1950 to 195943
- 1960 to 196713
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