@book {9783818607456, title = "Arbeitsblätter Ackerbau", author = "Barten, Juliane", isbn = "9783818607456", edition = "2", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783818607456", url = "https://content-select.com/de/portal/media/view/5c7e5030-ca3c-449d-885a-20a4b0dd2d03", publisher = "Verlag Eugen Ulmer", language = "ger", }