Index of doctoral dissertations and master's theses, with coverage from 1861 to the present. Those published from 1980 to present include abstracts, and many of those published since the 1990's are available in full text (PDF digital format) along with 24 page previews. Full text dissertations may be downloaded to a zip disc or emailed to a user account (but be aware that restrictions on your email account or security precautions at your institution might prevent the document from reaching you after leaving the Library). Please limit printing from Library of Congress workstations to citations and summaries.

American Doctoral Dissertations, is an open-access database built to assist researchers in locating both historic and contemporary dissertations and theses. Created with the generous support of the H. W. Wilson Foundation and the Congregational Library & Archives in Boston, it incorporates EBSCO?s previously released American Doctoral Dissertations, 1933-1955, and features additional dissertation metadata contributed by select American colleges and universities. Providing researchers with citations to graduate research across a broad span of time, from the early 20th century to the present, this database will continue to grow through regular updates and new partnerships with graduate degree-granting institutions. The subset of this database, American Doctoral Dissertations, 1933-1955, provides electronic access to the only comprehensive record of dissertations completed during that time period, the print index Doctoral Dissertations Accepted by American Universities. Containing twenty-two years of dissertation research and amounting to nearly 100,000 citations, this index was compiled annually for the National Research Council and The American Council of Learned Societies by the Association of Research Libraries. It was published by the H. W. Wilson Company.
Coverage: Early 20th century to the present

Open Access Theses and Dissertations (OATD) is an index of over 1.6 million electronic theses and dissertations (ETDs) from around the world. To the extent possible, the index is limited to records of graduate-level theses that are freely available online. The full text of all papers lives on the original hosting site, usually the repository of the university that granted the degree. OATD indexes about the first 30 pages of some theses in order to show search hits, but in no case does OATD index or store the full text of the paper.