- 1916 to 191988
- 1920 to 1924118
- 1925 to 1929216
- 1930 to 19342
- 1935 to 19390
- 1940 to 19440
- 1945 to 1949201
- 1950 to 1954261
- 1955 to 1959260
- 1960 to 1964243
- 1965 to 1969222
- 1970 to 197413
- 1975 to 197942
- 1980 to 198412
- 1985 to 19868
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