You can link to a catalog record for an item in our physical item in our collections. The catalog record will show the current location of an item (if for instance, it's currently on Course Reserves and the current status, so students can see if it has been checked out.
Search the catalog and find the record for the item in question. Click through the result to see its detailed record screen:
Select the page's URL up to the biblionumber=XXXXX part. This is the page's persistent URL.