@Book{Spiegel1866,
author  = "Spiegel, Friedrich von",
title   = "Die metrischen Theile des Avesta",
year    = "1866",
address = "München",
series  = "Sitzungsberichte",
volume  = "1866,2,1",
url     = "https://publikationen.badw.de/de/003385080",
}