- 1930 to 1934557
- 1935 to 1939766
- 1940 to 1944976
- 1945 to 19492,861
- 1950 to 19543,071
- 1955 to 19592,781
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