- 1920 to 19211
- 1922 to 19231
- 1924 to 19251
- 1926 to 19271
- 1928 to 19291
- 1930 to 19310
- 1932 to 19330
- 1934 to 19350
- 1936 to 19371
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