@Book{Gümbel1875,
author  = "Gümbel, Carl Wilhelm von",
title   = "Beiträge zur Kenntniss der Organisation und systematischen Stellung von Receptaculites",
year    = "1875",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 12, Abth. 1 = [3]",
url     = "https://publikationen.badw.de/de/003082968",
}