Do you want articles that we don't have access to here at the U of M Libraries? Usually we can get a pdf or other copy for you.
Or, are there books that you want that we don't have? We'll try to borrow a copy for you.
Currently affiliated U of M Twin Cites Campus people with active borrowing privileges can use interlibrary loan for articles, books, dissertations, and more things that we don't have here at the library. Usually there is no charge.
Set up an account and make your request at Interlibrary Loan