Origin of structures in database

Just a quick query, I was wondering where the structures in the database come from? Specifically, I'm after the origin of the biphenyl crystal structure, it's very similar to those in the cambridge structural database, but not identical, and doesn't seem to have any reference in the metadata.

(In this folder under windows: C:\Program Files (x86)\BIOVIA\Materials Studio 17.2\share\Structures\molecular-crystals\misc)