- 1930 to 19343
- 1935 to 19398
- 1940 to 194416
- 1945 to 194928
- 1950 to 19543
- 1955 to 19590
- 1960 to 196496
- 1965 to 1969113
- 1970 to 1974148
- 1975 to 1979170
- 1980 to 19842
- 1985 to 19895
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