- 1900 to 19093
- 1910 to 191921
- 1920 to 192923
- 1930 to 193919
- 1940 to 194940
- 1950 to 195932
- 1960 to 196948
- 1970 to 1979266
- 1980 to 1989449
- 1990 to 19993
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