Source images IDS 16729 APG, 300, D/ 4, No. 550, (Low German fair copy autograph, 16th-century)
Facsimile of the source from the collection of Archiwum Państwowe w Gdańsku, 300, D/ 4, No. 550; copying, dissemination or publication in any form (including electronic) solely with prior written permission from the source's owner.