- 1926 to 19271
- 1928 to 19290
- 1930 to 19310
- 1932 to 19330
- 1934 to 19350
- 1936 to 19375
- 1938 to 19390
- 1940 to 19410
- 1942 to 19430
- 1944 to 19450
- 1946 to 19471
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