@book{ 0-1075204666, title = {Der Cappenberger Barbarossakopf: und die Anfänge des Stiftes Cappenberg}, series = {Münstersche Forschungen}, author = {Grundmann, Herbert}, address = {Köln u.a.}, publisher = {Böhlau}, year = {1959}, language = {German}, url = {https://katalog.skd.museum/Record/0-1075204666} }