Formerly known as Dissertation Abstracts. Provides full text access 1997-present to most dissertations from U.S. institutions. Provides indexing information to dissertations 1861 - present.
A caveat, many universities, including OU, no longer submit the full text of their dissertations in this database, but now deposit their dissertations in an institutional repository (at OU, this is called SHAREOK).
Dissertations are indexed from 1861 to the present, so even if full text is not available, you can get an abstract and information about the author, year, advisors, etc.
If the dissertation is not available electronically, can order through interlibrary loan.
Use a general search engine to find dissertations from the last couple of years from other universities.
Provides access to dissertations from European higher education institutions. "The DART-Europe partners help to provide researchers with a single European Portal for the discovery of Electronic Theses and Dissertations (ETDs)."