Title Change

Well, I didn't actually ask any catalogers about this, but I did some extensive research in the catalog and found that for every journal that I came across that had a name change, both titles appeared as separate records and then had a message in the notes field explaining that either "this is the old title until volume whatever and now the journal is known as something else;" or that "this is the new title and the previous issues can be found under this other title." I also consulted AACR2, and it says that when a continuing resource experiences a title change, you create a new record for each title.