Theses Databases:
"First Search" Disseration Database from WorldCat
The American Theological Library Association's "Research in Ministry" D.Min. dissertation database
Virginia Tech has an Open Archive Initative database of full text Theses and Dissertations
Theses Canada
Twenty-four universities in the United Kingdom have a combined disseration search engine:
Copac is a traditional library catalogue - which means it gives access to details of documents and their location. The records on Copac represent the merged online catalogues of members of the Consortium of Research Libraries (CURL). There are some 30 million records on Copac representing the merged holdings of 27 CURL member institutions, including the British Library, the National Library of Scotland, the National Library of Wales/Llyfrgell Genedlaethol Cymru, and the National Art Library (V&A), plus special collections from a small number of non-CURL libraries.