- 1890 to 18992
- 1900 to 19090
- 1910 to 191931
- 1920 to 1929150
- 1930 to 1939273
- 1940 to 1949123
- 1950 to 195926
- 1960 to 196935
- 1970 to 19790
- 1980 to 198929
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