- 1920 to 192413
- 1925 to 1929186
- 1930 to 1934171
- 1935 to 193998
- 1940 to 1944352
- 1945 to 1949479
- 1950 to 1954357
- 1955 to 1959104
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