@Book{Pettenkofer1851,
author  = "Pettenkofer, Max von",
title   = "Chemische Untersuchung der Adelheidsquelle zu Heilbrunn in Oberbayern",
year    = "1851",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 6, Abth. 1 = [2]",
url     = "https://publikationen.badw.de/de/003082824",
}