https://books.googleusercontent.com/books/content?req=AKW5QacAagDNr2yEqa72dvnHDIR00Jt0XpMRRgeUQDPxzuL25IN0LJrt4iCB11Zm_s1Xm_rcv997zywugrdDMSffO0Rwd8IbIlOZdhObai8WVkU7qKCD_RkPm97Cv9EHcZffhHyrZ9YYcaodl9rqmNFmXfKgDGGeTleiELxrCLvAyae0I5UkR1KhNQVqK_pXn7kLUXZEoXZmo6OL9fc0_3VGI9K9qB5-jTovusg8qkTctlBdNdo8wlRJXuPgSGMxmW7pbtbTn-L_rQGkACMIKPmG26xjyHqEqmeHeHLQN9j1rT7NWO1Uptg
https://de.wikisource.org/wiki/Helmuth_von_Bl%C3%BCcher
https://de.wikisource.org/wiki/Seite:Saxoniae_Inferioris_(Merian)_210.jpg
http://www.vogel-soya.de/Adel/BluecherP106.html