- 1935 to 193945
- 1940 to 194434
- 1945 to 19496
- 1950 to 19543
- 1955 to 19593
- 1960 to 19642
- 1965 to 19692
- 1970 to 19741
- 1975 to 19791
- 1980 to 19843
- 1985 to 19892
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