1. Die Urkunden Friedrichs I. [des Ersten] Author/Creator: Frederick I, Holy Roman Emperor, approximately 1123-1190 Publication/Creation: Hannover : Hahn, 1975- Resource Type: Book Access & Availability: Loading
2. Die Urkunden Heinrichs des Löwen, Herzogs von Sachsen und Bayern Publication/Creation: Leipzig : Karl W. Hiersemann, 1941-1949 Resource Type: Book Access & Availability: Loading