- 19112,246
- 1912 to 19143,051
- 1915 to 19162,667
- 1917 to 19196,825
- 1920 to 19213,367
- 1922 to 19245,129
- 1925 to 19263,536
- 1927 to 19293,781
- 1930 to 19312,617
- 1932 to 19342,896
- 19351,967
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