Now, when you are viewing an entry, at the bottom of all the fields corresponding to this entry. All the linked libraries related to the entry are shown one after another. But with all the entries expanded by default. So, if you have too many entries in one or various linked libraries, you have to scroll down till to reach the next linked library.
I think it would be easy to see at a glance: In the header of the all linked libraries, the name of each library, the number of entries for this library, and a way to collapse or expand it.