MnLINK - Search libraries across Minnesota. Use the "Get It" button to request a book for pickup at the Century Library.
Worldcat.org - Search libraries in the United States. If Century does not have the item, and you need it immediately, this will show you the nearest location. Otherwise, request items through interlibrary loan.
Worldcat via FirstSearch - Search libraries in the United States using an advanced interface with many options. Includes links to published reviews and excerpts. Request items through interlibrary loan.