- 1942 to 19443
- 1945 to 19491
- 1950 to 19541
- 1955 to 19593
- 1960 to 19641
- 1965 to 19692
- 1970 to 19740
- 1975 to 19790
- 1980 to 198411
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