{"id":"001593544","type":"book","title":"Urkunden und erzählende Quellen zur deutschen Ostsiedlung im Mittelalter","publisher":"Wissenschaftliche Buchgesellschaft","publisher-place":"Darmstadt","author":[{"family":"Helbig","given":"Herbert"},{"family":"Weinrich","given":"Lorenz 1929-"}],"issued":{"raw":"1970"}}