@book {9783823390589, title = "Früher Fremdsprachenerwerb im Elementarbereich", author = "Seifert, Heidi", isbn = "9783823390589", edition = "1", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783823390589", url = "https://content-select.com/de/portal/media/view/58c7ba8d-e380-4ad6-a3b0-4d7db0dd2d03", publisher = "Narr Francke Attempto", language = "ger", }