@Book{Weinschenk1902,
author  = "Weinschenk, Ernst",
title   = "Zur Kenntniss der Graphitlagerstätten. Chemisch-geologische Studien. Alpine Graphitlagerstätten",
year    = "1902",
address = "München",
series  = "Abhandlungen",
volume  = "Bd. 21, Abth. 1 = [2]",
url     = "https://publikationen.badw.de/de/006219901",
}