@book{ title = "Ruralia commoda", author = "Crescentiis, Petrus de,Richter, Will,Richter-Bergmeier, Reinhilt", year = "2002", publisher = "Winter", address = "Heidelberg", title = "das Wissen des vollkommenen Landwirts um 1300", language = "lat","ger", howpublished = "print", isbn = "3825312879", keywords = "Quelle", pages = "20 cm", series = "Editiones Heidelbergensis, 30", }