- 1920 to 19241
- 1925 to 19291
- 1930 to 19340
- 1935 to 19390
- 1940 to 19441
- 1945 to 19491
- 1950 to 19545
- 1955 to 19596
- 1960 to 196416
- 1965 to 196918
- 1970 to 19741
- 1975 to 19791
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