- 19272,906
- 1928 to 19292,244
- 1930 to 19313,037
- 1932 to 19332,379
- 1934 to 19352,974
- 1936 to 19374,113
- 1938 to 19393,830
- 1940 to 19414,262
- 1942 to 19433,549
- 19443,064
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