- 1950 to 1954129
- 1955 to 1959633
- 1960 to 1964672
- 1965 to 19691,697
- 1970 to 19741,251
- 1975 to 1979714
- 1980 to 1984694
- 1985 to 198963
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