@Book{Schumann1969,
author  = "Schumann, Walter",
title   = "Geochronologische Studien in Oberbayern auf der Grundlage von Bändertonen",
year    = "1969",
address = "München",
series  = "Abhandlungen",
volume  = "134",
url     = "https://publikationen.badw.de/de/001979646",
}