@book{id_3770,
author = "Koch, Walter",
title = "Die Urkunden Friedrichs II.",
year = "2007",
address = "Hannover",
publisher = "Hahn",
series = "Urkunden Kaiser Friedrichs II.",
volume = "2",
isbn = "978-3-7752-2002-6",
url = "http://www.dmgh.de/de/fs1/object/display/bsb00066349_00002.html?sortIndex=030%3A040%3A0014%3A010%3A02%3A00",
}