Most theses and dissertations are cataloged in OneSearch. You can make your search easier by filtering your search results to show only theses and dissertations. From the OneSearch homepage, click on Advanced Search, click on Material Type, then select Dissertations & Theses:
The location where items can be found is listed underneath each search result:
Theses and dissertations that have not been cataloged can be found in the Digital Commons @ ETSU.