U-M dissertations can be found in Mirlyn. Some U-M dissertations may be available electronically in Deep Blue, U-M's institutional repository. You should also check ProQuest Dissertations & Theses to see if we have electronic access to the dissertation you are looking for.
You may also request a dissertation via Interlibrary Loan.
You can also purchase your own personal copy of a thesis from another university fast, for a modest price through ProQuest Dissertations & Theses. Includes free full-text (in PDF) to all U-M and CIC/Big Ten Universities' dissertations since 1997.