Media type: E-Article Title: Einleitung Contributor: Lepsius, Susanne; Reichlin, Susanne imprint: Walter de Gruyter GmbH, 2015 Published in: Das Mittelalter Language: Not determined DOI: 10.1515/mial-2015-0013 ISSN: 0949-0345; 2196-6869 Keywords: General Earth and Planetary Sciences ; General Engineering ; General Environmental Science Origination: Footnote: