@Book{Heyd1872,
author  = "Heyd, Wilhelm",
title   = "Valentin Fernandez Aleman. Nachträge zu einer Abhandlung von Friedrich Kunstmann",
year    = "1872",
address = "München",
series  = "Sitzungsberichte",
volume  = "1872,13",
url     = "https://publikationen.badw.de/de/007459075",
}