1861- to present. The Dissertations Abstracts database contains citations for dissertations and theses from institutions in the North America and Europe. Titles published from 1997 forward have 24 page previews and are available as full test.
OpenDOAR is an authoritative directory of academic open access repositories. Each OpenDOAR repository has been visited by project staff to check the information that is recorded here. This in-depth approach does not rely on automated analysis and gives a quality-controlled list of repositories.
What's Missing?
Do you have any suggestions for thesis and dissertation resources that should be included on this list? If so, post your suggestions in the "Comments."