Is Nostrodamus Using Bibliomancy?

Historical allusions for 653 out of the 900, forty two quatrains have been identified. This means we've identified the specific source nostro domus was using. If he was using bibliomancy, it would explain why there's no apparent organizational scheme to the prophecies. One way he could write such a book is if he's only collecting prophecies that already existed and hidden in other people's books.