@Book{Spiegel1850,
author  = "Spiegel, Friedrich von",
title   = "Über einige eingeschobene Stellen im Vendidad",
year    = "1850",
address = "München",
series  = "Abhandlungen",
volume  = "6,1 : 1. Abth.",
url     = "https://publikationen.badw.de/de/009143847",
}