Have you heard that the Library of Michigan has updated their website? I can hear the groans now, but you have to check the website out, you won't be disappointed. I love websites that puts the information most used front and center. The Library of Michigan's website does that.
Answer Catalog at the Library of Michigan
Scroll down under the beautiful picture of the library and you will find the Answer Catalog. This is the collection catalog for the Library of Michigan and the Archives of Michigan and other libraries (Law library, Michigan State University libraries, Government Documents, Map Library and more). Some of these libraries are located offsite from the Library of Michigan. If visiting, make note of which library holds the resource you are looking for.