@book { HeroldundWappenalsMediendesMittelalters, title = "Herold und Wappen als Medien des Mittelalters", author = "Paul {Eschenhagen}", year = "2003", publisher = "GRIN Verlag", address = "München, Germany", doi = "10.3239/9783638177672", url = "https://www.hausarbeiten.de/document/11675" }