The link you sent is for a source containing abstracts of dissertations. I found one copy of the dissertation itself on microfiche at the University of Iowa (https://search.lib.uiowa.edu/primo-explore/fulldisplay/01IOWA_ALMA21312554420002771/01IOWA). If that's the source you want you will need to request it through ILLiad (https://illiad.iwu.edu/illiad/logon.html) by logging in to the form with your IWU credentials and using the "Loan" form under the "New Requests" link in the blue toolbar.
