- 1930 to 19341
- 1935 to 193914
- 1940 to 194414
- 1945 to 194914
- 1950 to 195429
- 1955 to 195926
- 1960 to 196413
- 1965 to 196913
- 1970 to 19740
- 1975 to 19790
- 1980 to 19840
- 1985 to 19890
- 1990 to 19942
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