- 18992,470
- 1900 to 19012,925
- 1902 to 19042,487
- 1905 to 19062,528
- 1907 to 19092,804
- 1910 to 19112,820
- 1912 to 19143,299
- 1915 to 19162,938
- 1917 to 19197,077
- 1920 to 19213,646
- 1922 to 19245,403
- 19253,327
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