@Book{Spengel1847,
author  = "Spengel, Leonhard",
title   = "Ueber die Politik des Aristoteles",
year    = "1847",
address = "München",
series  = "Abhandlungen",
volume  = "5,1 : Abth. 1",
url     = "https://publikationen.badw.de/de/003205022",
}