- 19111,065
- 1912 to 19141,534
- 1915 to 19161,132
- 1917 to 19194,333
- 1920 to 19211,403
- 1922 to 19242,489
- 1925 to 19261,720
- 1927 to 19291,672
- 1930 to 1931958
- 1932 to 1934475
- 193539
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