The University Digital Conservancy (UDC) offers access to most recent U of M dissertations.
UDC Dissertation Collection
We also subscribe to Digital Dissertations. (Proquest Dissertations & Theses)
You can find information about dissertations from many schools in the U.S. and world. U of M dissertations and those from other Big 10 schools can be downloaded from 1997-.
Paper copies of many older U of M dissertations are kept in Wilson Library and the MLAC storage facility. Search MNCAT by the author name or dissertation title to find the location information.
If we don't have a copy of a dissertation available, we may be able to borrow a copy for you using Interlibrary Loan