@incollection{,
address  = {},
author = {Irgang, Winfried},
booktitle = {Irgang, Schlesien im Mittelalter},
keywords = {Schlesien; Mittelalter; Irgang, Winfried (1942-)},
pages = {3-19},
title={Land und Städte in Schlesien},
uniqueid = {1301214},
url = {http://opac.regesta-imperii.de/id/1301214},
year = {2007}
}