Library FAQ:

You can request an item from another DU location directly through our catalog.  

When you search our catalog, the item entry will tell you if any other DU libraries have it. After you sign in, you'll see an option to request it. 

Here is an example:

 A popup box will ask for details about your request.  Fill in using the drop down menus and hit "request."

You will receive a notification when your request is available.