- 1909 to 1909 1
- 1910 to 1919 1
- 1920 to 1929 3
- 1930 to 1939 10
- 1940 to 1949 6
- 1950 to 1959 5
- 1960 to 1969 11
- 1970 to 1979 160
- 1980 to 1989 212
- 1990 to 1997 2
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