1. Catechismus minor puerorum, generoso puero Ottoni Fürster, Creator: Rhegius, Urbanus, 1489-1541, author. Date: 1536 Format: Text Access: Public
2. Catechesis, illustriss, principi Francisco Othoni, Brunsuicensium, Luneburgensium[q́ue] duci, puero generosissimo, & toti scholae ducali dicata, Creator: Rhegius, Urbanus, 1489-1541, author. Date: unknown Format: Text Access: Public