Source images IDS 16009 BJ, AS (from the former Prussian State Library in Berlin), Isabella, p. [2] unnumbered (Latin fair copy in secretary's hand, author's signature, 16th-century)

Facsimile of the source from the collection of Biblioteka Jagiellońska, AS (from the former Prussian State Library in Berlin), Isabella; copying, dissemination or publication in any form (including electronic) solely with prior written permission from the source's owner.