You can only see if the Library owns/subscribes to a book/journal article if you search from our page.
Our Google Scholar search box has code written into the search function that makes it possible for you to see if the Full Text is available at the NWU.
Note: If you link your Google Account to the NWU it is no longer necessary to do your search from the Library Google Scholar page as the "Full text @NWU" link will appear even if you don't start from our search page.