- 1928 to 192959
- 1930 to 193487
- 1935 to 1939110
- 1940 to 194449
- 1945 to 194940
- 1950 to 195432
- 1955 to 195936
- 1960 to 1964130
- 1965 to 1969145
- 1970 to 1974108
- 1975 to 1979157
- 1980 to 1983175
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