Dissertations and Theses This link opens in a new windowThis database provides citations for over 2.7 million dissertations and theses from colleges and universities around the world. Close to half are available in PDF form that researchers can download. All St. Thomas dissertations that have been submitted to the database are available in PDF also. If you should come across a document that does not have a PDF, you may purchase a copy or request it through interlibrary loan (ILLiad).