You can locate dissertations in these databases by conducting an Advanced Search. Under the Publication Type, select Dissertation.
You can locate hundreds of dissertations and theses using the Basic Search option in ProQuest Central. When you open the ProQuest Central search interface, click on the Dissertations & Theses tab and the search term or phrase you wish to research. Be sure to also indicate by adding a check mark for full text and/or peer reviewed materials.
You can also search for dissertations and theses using the Advanced Search option in ProQuest Central and other ProQuest databases. Under the Source Type and/or Document Type, select Dissertations and Theses.
Once you are on the WorldCat.org homepage, click on the Advanced Search link just below the search text box.
On the Advanced Search page, enter the terms you would like to search. At the bottom, click on the Content drop-down menu and select Dissertation/Thesis.