@Book{Freyberg[1831],
author  = "Freyberg, Maximilian Prokop von",
title   = "Historische Classe",
year    = "[1831]",
address = "",
series  = "Jahresberichte",
volume  = "2 (1829/31), Seite 95-101",
url     = "https://publikationen.badw.de/de/043709165",
}