author = { Kästner, Erich Ernst Klett Verlag Rørvig, Lore AND Petersen, Lykke AND Trier, Walther },

title = { Das fliegende Klassenzimmer },

publisher = {EASY READERS},

publisher = {},

isbn = {9788723512963},

isbn = {9783125620339},

keywords = { Deutschunterricht },

year = {[2015]},

year = {, ©2015},

abstract = {1. ISBN im Buch formal falsch, 2. ISBN auf dem Umschlag},

abstract = {B (A2, CEFR)},

booktitle = {Easy Readers - Leicht zu lesen},

address = { Copenhagen , },