{"id":"001196207","type":"book","title":"Der Wasserstand der \"Oberen Seen\" in Mecklenburg in Mittelalter und früher Neuzeit","pages":"195-208","container-title":"Archäologische Berichte aus Mecklenburg-Vorpommern, 6 (1999","author":[{"family":"Ruchhöft","given":"Fred 1971 -"}],"issued":{"raw":"1999"}}