- 1920 to 192414
- 1925 to 192914
- 1930 to 193413
- 1935 to 193913
- 1940 to 194413
- 1945 to 194917
- 1950 to 195421
- 1955 to 195921
- 1960 to 196413
- 1965 to 196913
- 1970 to 197414
- 1975 to 197914
- 1980 to 19840
- 1985 to 19890
- 1990 to 19932
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