@book {9783800123230, 
	title = "Arbeitsblätter Landtechnik 1",
	author = "Rieker, Marie-Luise",
	isbn = "9783800123230",
	keywords = "Schulbuch Landwirtschaft",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783800123230",
	url = "https://content-select.com/de/portal/media/view/519cc67d-2f20-4d6c-a157-290f5dbbeaba",
	publisher = "Verlag Eugen Ulmer",
	language = "ger",
}