@Book{Göppert1861,
author  = "Göppert, Heinrich",
title   = "Die Kohlen von Malowka in Central-Russland",
year    = "1861",
address = "München",
series  = "Sitzungsberichte",
volume  = "1861,1,8",
url     = "https://publikationen.badw.de/de/003399719",
}