@Book{Wagner1844,
author  = "Wagner, Johann Andreas",
title   = "Die geographische Verbreitung der Säugthiere",
year    = "1844",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 4, Abth. 2 = [6]",
url     = "https://publikationen.badw.de/de/003796806",
}