Dissertations can be found in several places.
Most university libraries retain copies of dissertations completed at their institutions. Older dissertations tend to be in circulating print collections and can be found via library catalogs (in OneSearch) and WorldCat. Newer dissertations are often found in institutional digital repositories, such as OpenRiver. Many university libraries have been able to digitize older dissertations as well. In short, you may need to search one or more places.
Dissertations from Winona State University
Dissertations, theses, Scholarly Inquiry Papers and other graduate scholarship completed at WSU can be found in two places:
Dissertations from around the World