Matthaeus <de Cracovia>: Dialogus rationis et conscientiae de frequenti usu Communionis. [Mainz] : [Drucker des Catholicon (=Peter Schöffer???)], 1469. Badische Landesbibliothek Karlsruhe,
Dg 198a,
https://nbn-resolving.org/urn:nbn:de:bsz:31-290007 / Public Domain Mark 1.0