To locate business related dissertations and theses within the Library, select the All Databases link on the Library welcome page:
Then, select ABI INFORM/Collection from the alphabetical list.
In the database, simply select Browse above the search box:
Then scroll down to More Featured Content where you can select ProQuest Business Dissertations and Theses:
If you would like to search for dissertations on other topics than business, this FAQ will help you.
PQDT Open is another source you can consult for dissertations. This resource can also be accessed from the All Database list.
Here you can search open access dissertations in a variety of disciplines at no cost.