- 1950 to 1954137
- 1955 to 1959137
- 1960 to 1964315
- 1965 to 1969314
- 1970 to 1974240
- 1975 to 1979242
- 1980 to 19846
- 1985 to 19896
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