- 1930 to 19349
- 1935 to 193911
- 1940 to 19449
- 1945 to 19499
- 1950 to 19549
- 1955 to 19599
- 1960 to 19649
- 1965 to 19699
- 1970 to 19749
- 1975 to 197910
- 1980 to 19849
- 1985 to 19899
- 1990 to 199412
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