@Book{331578611, editor="Abulafia, David", title="Medieval frontiers: concepts and practices", year="2002", publisher="Ashgate", address="Burlington, Vt. [u.a.]", keywords="Geschichte 500-1500; Kongre{\ss}; Europa; Gesellschaft; Grenze; aEuropeHistorical geography; aEuropeBoundariesHistoryTo 1500; aMediterranean RegionHistorical geography; aFrontier and pioneer lifeEurope", note="ed. by David Abulafia and Nora Berend", note="Selected papers of a colloquium held Nov. 1998 at St. Catharine's College, Cambridge, with several additional articles", note="Literaturangaben", isbn="0754605221", language="English" }