- 1920 to 19211
- 1922 to 19231
- 1924 to 19251
- 1926 to 19271
- 1928 to 19291
- 1930 to 19310
- 1932 to 19330
- 1934 to 19355
- 1936 to 193719
- 1938 to 19394
- 19405
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