PQDT is the most comprehensive index to electronic doctoral dissertations and selected masters theses, including 1 million+ full text dissertations published from 1997 onward. To find Scandinavian theses, search "scandinavian" in "Subject heading".
University of Washington institutional repository hosted by the Libraries. Includes full text of digitized UW theses and dissertations in Scandianvian studies and Scandinavian languages and literature.
Search for hard copies of Scandinavian dissertations/theses using WorldCat and Primo (beta search) catalog interfaces. Best way to find older dissertations and theses, many of which have not been digitized.