@book{ title = "Ruralia commoda", author = "Crescentiis, Petrus de,Richter, Will,Richter-Bergmeier, Reinhilt", year = "1995", publisher = "Winter", address = "Heidelberg", title = "das Wissen des vollkommenen Landwirts um 1300", language = "lat","ger", howpublished = "print", isbn = "3825302938", keywords = "Quelle", pages = "20 cm", series = "Editiones Heidelbergenses, 25", }