@Book{Wagner(1844),
author  = "Wagner, Johann Andreas",
title   = "Die geographische Verbreitung der Säugthiere",
year    = "(1844)",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 4, Abth. 1 = [1]",
url     = "https://publikationen.badw.de/de/003796804",
}