- 18992,390
- 1900 to 19012,796
- 1902 to 19042,344
- 1905 to 19062,338
- 1907 to 19092,674
- 1910 to 19112,590
- 1912 to 19143,052
- 1915 to 19162,670
- 1917 to 19196,827
- 1920 to 19213,370
- 1922 to 19245,132
- 19253,060
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