@book {9783781555099, 
	title = "Grundlegende Bildung im Sachunterricht",
	isbn = "9783781555099",
	edition = "1",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783781555099",
	url = "https://content-select.com/de/portal/media/view/58c7ba85-eb1c-40c9-a354-4d7db0dd2d03",
	publisher = "Verlag Julius Klinkhardt",
}