@book {9783781555150, title = "Innovation Sachunterricht - Befragung der Anfänge nach zukunftsfähigen Beständen", isbn = "9783781555150", edition = "1", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783781555150", url = "https://content-select.com/de/portal/media/view/58c7ba85-be1c-4b3a-be2a-4d7db0dd2d03", publisher = "Verlag Julius Klinkhardt", }