More than 70,000 new full text dissertations and theses are added to the Proquest database each year through dissertations publishing partnerships with 700 leading academic institutions worldwide and collaborative retrospective digitization of dissertations through UMI's Digital Archiving and Access Program. Full Text dissertations are archived as submitted by the degree-granting institution.
The German national library (Die Deutsche Nationalbibliothek) receives a depository copy of every dissertation written in Germany.
Steps to find theses:
1. Type in your search terms into the search box
2. After clicking search and receiving a list of results, click on "Hochschulschriften" on the right side under "Alle Materialarten"
The Networked Digital Library of Theses and Dissertations (NDLTD) is an international organization dedicated to promoting the adoption, creation, use, dissemination, and preservation of electronic theses and dissertations (ETDs). It contains more than one million records of electronic theses and dissertations.